Drainage Wastewater Research Articles

BACTERIOLOGICAL QUALITY OF DRINKING WATER AND ASSOCIATED FACTORS AT COMMUNITY POINT SOURCES, IN ARUA DISTRICT, UGANDA

Background: Access to ample and safe water is vital, yet many globally lack this essential resource. Each year, 3.4 million individuals die from water-related diseases. Specifically, in Uganda, annual estimates suggest 89,000 cholera cases, resulting in 3,000 deaths. Objective: This study aimed to evaluate the bacteriological quality of drinking water and related factors in Arua Districts community water sources. Method: Utilizing a cross-sectional design and laboratory experiments, 140 samples were analyzed for coliform bacteria presence on filter membranes. Factors relating to contamination risks were identified via a sanitary inspection checklist. Data analysis was conducted using Stata/SE 17.0. Results: About 70.71% of samples contained bacteria, primarily total coliform. Significant risk factors included defective wastewater drainage (aOR: 19.7[5.34-72.72]), malfunctioning appliance parts (aOR: 10.7[2.52-45.92]), and inadequate or absence of fencing (aOR: 9.2[2.43-34.96]), each with a P-value <0.001. Conclusion: Ensuring safe drinking water requires treatment, quality monitoring, maintenance of appliances, and proper fencing to reduce bacterial contamination.

Risk assessment of metal contamination in wastewater drains of River Ghaggar in Punjab (India)

Risk assessment of metal contamination in wastewater drains of River Ghaggar in Punjab (India)

Kontribusi Nilai Islam Pada Program Instalasi Pengelolaan Air Limbah Berbasis Masyarakat Di Lingkungan 01 Kelurahan Tanah Seribu

Disposal of waste water which is a basic sterilization to oblige the kitchen to waste water and other waste. Seepage water drainage channels are very important, because waste water drainage channels can also limit the spread of disease to the local area. The aim of this research is to see the contribution of Islamic values ​​to the community-based wastewater management installation program in the 01 Tanah Seribu Village environment. This research uses a qualitative research method with a descriptive approach. Results of research on Islamic quality commitment to regional-based water waste by implementers of climate development programs in Tanah Seribu District 01, with details: 1) Viability is considered not yet ideal because the implementation of water content quality testing is not optimal because it does not pay attention to needs and the KPP's lack of attention to support WWTP. 2) The productivity of IPAL construction is considered large because it receives financial assistance from the APBN. However, functional expenditure is not yet ideal due to low regional support. 3) The arrangement should be ideal considering that the benefits of the program are mostly felt by the local area. 4) Adequacy is ideal because the IPAL program has many benefits. 5) Responsiveness regarding public reactions is considered certain, but open attitudes are still lacking. 6) Precision is not in accordance with Islamic qualities because there is no public awareness, but it is considered ideal because it tends to be the answer to the defeat of the water waste problem. Based on Islamic values, it can be concluded that the IPAL program in Environment 01, Tanah Seribu Subdistrict is in line with Islamic values ​​as seen in terms of environmental cleanliness which is increasingly maintained. However, on the other hand, community participation is still less than optimal in being responsible for protecting and preserving the environment.

Gambaran Sanitasi Lingkungan Pasar dan Tingkat Kepadatan Lalat di Pasar Inpres Larantuka, Kecamatan Larantuka, Kabupaten Flores Timur

Market environment sanitation is an effort to monitor, prevent, control and control everything in the market environment such as flies. The density of flies can increase if the environment is dirty, for example markets that do not meet market environmental sanitation requirements such as rubbish dumps, waste water drainage channels and adequate water supplies. The aim of this research is to determine the description of environmental sanitation conditions and the density of flies at the Larantuka Inpres Market, Larantuka District, East Flores Regency. The type of research used is descriptive observation. The samples used in this research were all market sanitation facilities or facilities. The data obtained was then analyzed descriptively. The results of the research show that the results of the environmental sanitation conditions of the Larantuka Inpres Market based on the results of calculating the assessment variables on the external supervision observation sheet for environmental health inspections are categorized as not meeting the requirements for a healthy market (57.5%). The level of fly density at the Larantuka Inpres Market based on the results of measurements and calculations was obtained. 7 birds/blockgrill with a high density category of flies, it is necessary to secure the fly breeding places and if possible plan control measures. Therefore, it is necessary to collaborate between the government and local communities, including traders, market managers and district health services, to pay attention to the cleanliness of the market environment.

Penyuluhan Pencegahan dan Penanganan Penyakit Melalui Saluran Pembuangan Air Limbah (SPAL) di Desa Datahu, Kecamatan Anggrek, Kabupaten Gorontalo Utara

Health is one of the needs and foundations for humans to be able to live normally by working, creating and enjoying life to the fullest in the world. One of the health problems is the cleanliness of the wastewater drainage system (SPAL). Counseling was carried out in Datahu village, Kec. Orchid, Kab. North Gorontalo, the target of extension is the community in Datahu village. The factor that is the main obstacle in the nutritional health problem of mothers and children is related to the lack of awareness of having waste water drainage channels and rubbish dumps by the Datahu village community. The aim of this outreach is to inform the community about the importance of paying attention to the nutritional conditions of mothers and children as well as handling and preventing the main problems in Datahu village. The results of the outreach were that the people of Datahu village knew how to make waste water drainage channels and the importance of having a waste disposal site to avoid nutritional problems for mothers and children in Datahu village.

Utilization of thermally treated sludge for the removal of hexavalent chromium from drainage wastewater: a laboratory and field study

Utilization of thermally treated sludge for the removal of hexavalent chromium from drainage wastewater: a laboratory and field study

Impact of feeding regimes on the performance of anaerobic sequencing batch membrane bioreactor treating wastewater from an urban drain

ABSTRACT This work evaluated an anaerobic sequencing batch membrane bioreactor (AnSBR-MBR) equipped with waste-based ceramic membranes for treating low-strength real drain wastewater. Two feeding regimes, viz. settled feed (Phase 1) and mixed feed (Phase 2) were compared. The biological performance (chemical oxygen demand (COD) and phosphate (PO43-) removal) and filtration performance (total suspended solids (TSS) removal and membrane fouling) were investigated. The reactor characteristics in terms of solids content, sludge settling behaviour, and extracellular polymeric substances (EPS) were also assessed. In Phase 1, the settled feed (with the absence of particulate organic matter) resulted in low volatile suspended solids (VSS; 0.23 ± 0.15 g/L), causing low COD removal (28.38 ± 8.14%). In the mixed feed regime in Phase 2, VSS increased (1.82 ± 0.60 g/L) due to the organic content in the particulate matter, which gave microorganisms additional food, resulting in increased COD removal (47.42 ± 2.81%); this phase was also characterised by lower membrane fouling because of the lower EPS content. Marginally higher TSS removal was obtained as well in Phase 2 (96.72 ± 3.26%) than in Phase 1 (90.48 ± 8.14%). This work demonstrates that AnSBR-MBR performance is superior with mixed drain wastewater containing suspended solids and thus pre-settling is not recommended.

The role of microalgae in effective instream agricultural wastewater treatment

ABSTRACT The Egyptian water crisis has encouraged the exploration of innovative solutions for wastewater treatment. One promising approach is using treated agricultural drainage water for its large amount per year and low pollution. There are many methods used for the treatment of wastewater, but this research focused on a new one which is the use of microalgae for in-situ treatment of wastewater, due to its ability to uptake and adsorb pollutants, aerate water, and produce biomass for potential use as a biofuel or fertilizer. Microalgae have shown great potential for removing various pollutants from wastewater, including organic matter, nutrients, heavy metals, and pathogens. Moreover, the use of microalgae for wastewater treatment can be more cost-effective and sustainable than traditional wastewater treatment methods, which often require large and expensive infrastructure. This study aimed to investigate the effectiveness of using microalgae for in-situ treatment of agricultural drainage wastewater of Bahr El-Baqar drain. The results revealed that the removal efficiencies were 29% for BOD (biochemical oxygen demand), 46.9% for COD (chemical oxygen demand), 56.1% for TSS (total suspended solids), 31% for HM (Heavy Metal) removal, and 86% increment in DO (Dissolved Oxygen) concentration. This experiment provided evidence that microalgae could be a promising and cost-effective solution for in-situ treatment of agricultural drainage wastewater, with high removal efficiencies for pollutants in wastewater and the potential to reduce the need for constructing large and expensive wastewater treatment plants.

Combining biochar with sediment in the treatment for the effectiveness of sulfate and heavy metal Pb reduction of acid mine drainage

The increasing mining activities have led to the problem of acid mine drainage (AMD) pollution. A method that combines biochar treatment as an adsorbent with wetland sediment treatment as a source of sulfate-reducing bacteria is used to address AMD effectively. This research aimed to determine the ability of biochar in combination with wetland sediment treatment to reduce sulfate and heavy metal content in acid mine drainage wastewater. This research was conducted on a laboratory scale in an AMD wastewater treatment reactor with the following treatments of biochar mixed with wetland sediment. Observations included sulfate content, pH, and heavy metal content. Scanning electron microscope (SEM) analysis was also performed on the biochar. SEM observations revealed the presence of small, dense, and irregularly shaped pores on the surface of the biochar. The results on day 30 showed that biochar mixed with wetland sediment was able to reduce sulfate concentration by 74.19% and reduced Pb by 73.79%, compared with treatment sediment only to 64.81% sulfate concentration and reduced Pb by 53.85%, treatment biochar only had reduced sulfate of 46.90% and reduced Pb by 58.67% and control 1.79% sulfate concentration and reduced Pb by 1.87%.

Use of a peracetic acid (PAA) disinfectant to reduce total viable bacteria count in hospital wastewater drains

The periphery of the hospital water system interfaces at multiple points with patients and staff in clinical areas. This comprises mostly sinks and showers and presents a significant infection control risk. Wastewater drains in particular act as a reservoir of pathogens that can be transmitted to patients. Numerous strategies have been investigated as potential methods to reduce biofilm and bacterial load including regular application of biocidal chemicals. Traditional methods of assessing the efficacy of such products relies on culture-based microbiological techniques, usually targeting a limited range of key pathogens. We assessed the efficacy of a peracetic acid containing drain disinfectant product on seven clinical handwash basin drains, taking daily samples over six weeks (before, during and after use of the drain disinfectant product). We used a rapid, culture-independent estimation of total bacterial viable count (TVC) to assess efficacy. We applied long-read metagenomic sequencing to study the entire drain microbiome, which allowed taxonomic changes to be documented following use of the drain disinfectant product. All samples were found to be heavily contaminated, however the drain disinfectant product reduced the TVC from an estimated mean of 4228cfu/mL to 2874cfu/mL. This reduction was sustained in the two weeks following cessation of the product. Long-read metagenomic sequencing showed a microbiome dominated with Gram-negative organisms, with some taxonomic shifts in samples before and after application of the drain disinfectant. The impact on hospital-acquired infections from reducing bioburden in hospital drains by approximately a third, along with any associated changes in bacterial composition, needs evaluation in future studies.

Wpływ działalności antropogenicznej w dorzeczu górnego Dunaju na reżim temperatury wody Dunaju w Bratysławie

The man activity in the basin affects the water temperature in the increasingly higher levels (construction of water reservoirs, construction of thermal and nuclear power plants or drainage of waste water to streams). In this paper, we focused our attention on the evaluation of the impact of anthropogenic activity to increase the thermal load of the Danube River for the period 1926–2020 at the Bratislava (Slovakia) station. In the first part, the long-term trends of a series of monthly and annual water temperatures in the Danube (period 1931–2020) are identified. In the second part, the dependence of the range of daily water temperature values is analysed at the temperature of the atmosphere in Vienna. The impact of an increase in the temperature of the Danube water due to human activity was tried to identify for lower, average, and higher flows (for Danube discharge at Bratislava water gauge 1500 m3s-1, 2000 m3s-1, and 3000 m3s-1) by comparing two periods: 1932–1961, and 1991–2020. As the effect of water heating in the river stream is most noticeable during low flow (dry) periods and high air temperatures, only daily water and air temperature data from the warm months between May and September were used in the calculations. At monthly flow rates of 1500 m3s-1, the water temperature was, on average, 0.5°C higher during the period of 1991–2020 than it was during the period of 1932–1960. This growth could be attributed to human activities in the Danube basin above Bratislava (warming of water in the built tanks, the wastewater flow to the Danube flow, etc.)

Remote sensing and machine learning approach for zoning of wastewater drainage system

This study aimed to optimize drainage in Tiruchirappalli city using Geographic Information Systems (GIS), machine learning, and remote sensing. The integration of these methods involved multiple steps: remote sensing data was used to gather up-to-date information on land use and land cover (LULC), GIS provided a spatial framework for data integration and visualization, and machine learning, specifically a Random Forest (RF) model, was utilized for detailed LULC classification. Hydrological analysis using a Digital Elevation Model (DEM) helped delineate the watershed and drainage network, determining suitable zones for wastewater systems. Key factors such as ground slope, land use, and proximity to water bodies were considered. Buffer analysis was employed to transform and overlay these data layers. For the site suitability analysis, the Analytic Hierarchy Process (AHP) method was employed within the GIS to integrate various weighted factors, enabling a comprehensive assessment of potential locations for wastewater treatment facilities. Wastewater drainage zones were determined to be appropriate for zones 1, 8, 9, 11, 15, and 20, which correspond to areas of 40.40, 1.11, 1.00, 2.04, 1.69, and 2.46 Sq.km, respectively. This comprehensive approach enabled the identification of optimal wastewater drainage zones and suitable locations for treatment facilities, enhancing urban wastewater management.

Heavy metal accumulation of aquatic grasses from mine tailing's wastewater drainage spillway of BCL Cu‐Ni mine in Selebi Phikwe, Botswana

AbstractMining activities introduce countless contaminants into the environment, including toxic levels of heavy metals that accumulate in soil and water, requiring environmental management to prevent detrimental effects. One strategy is to use plants because of their natural ability to adsorb and accumulate different contaminants in their tissues. To develop a rhizofiltration technique for mine wastewater in Botswana, there is a need to identify suitable aquatic plant species which can remove heavy metals from acid mine drainage and associated sediments. Plant species growing in the vicinity of acid mine drainage at the BCL mine were sampled and analyzed for heavy metal concentration in the various plant tissues.The plants analyzed were: Cyperus papyrus; Phragmites australis; Schoenoplectus tabernaemontani; and Baumea rubiginosa. These plants all accumulated above‐average concentrations of Co, Cr, Cu, Ni, and Zn in their tissues, especially Cr, Cu, and Ni. C. papyrus accumulates more Cr (up to 6080.86 mg kg−1in shoots and 5047.15 mg kg−1 in roots), Cu (up to 2166.43 mg kg−1 in roots and 1231.12 mg kg−1 in shoots), and Ni (up to 949.97 mg kg−1 in roots and 1163.42 mg kg−1 in shoots). P. australis accumulates more Cu in roots (up to 7416.87 mg kg−1) than in shoots (221.71 mg kg−1). S. tabernaemontani accumulates more Ni than Cu and Cr which it mostly retains in the roots (1015.88 mg kg−1). B. rubiginosa accumulates more Cu than Ni with a concentration up to 927.36 mg kg−1 in shoots and 401.70 mg kg−1 in roots (BAF 35.53; TF 0.90). Among these plants' species, C. papyrus had the ability for multi‐metal accumulation, retaining Cr, Cu, and Ni.

Solvent-tolerant lignosulfonate-attapulgite/calcium carbonate coating on nylon filter mesh for oily water treatment

Due to the rapid increasing drainage of oily wastewater, robust and durable filtration materials with underwater superoleophobic coatings are highly desired. The existing underwater superoleophobic filter materials for oil/water separation are always subject to mechanical and chemical damages, causing the significant loss of superoleophobicity. Herein, a robust and tolerant nylon filter mesh (NFM) with underwater superoleophobicity was fabricated through simple layer-by-layer (LBL) assembly of lignosulfonate (LS), attapulgite (APT) nanorods, calcium ion, and carbonate on NFM. Compared with LS@CaCO3 assembly, the obtained LS-APT@CaCO3 assembly on NFM exhibits good micro/nano-structure, uniform distribution, and excellent underwater superoleophobicity (oil contact angle: > 156°). Moreover, after the fabricated mesh is subjected to the immersion in corrosive environments (acid, base, and salt aqueous solutions) and hot water as well as severe mechanical scratch, the oil contact angle are still higher than 147.5°, implying superb durability. More importantly, the as-obtained NFM is able to treat a variety of oil/pure water and oil/corrosive solution mixtures with separation efficiencies of over 98.2 %. Therefore, the as-prepared mesh has a huge application potential in oil-polluted water remediation due to the simple, facile, and eco-friendly preparation process.

Spatial Analysis of Environmental Factors in the Dengue Hemorrhagic Fever Incident at Soe City District

Introduction: In 2022, there was a large increase in cases resulting in extraordinary events cases in the TTS district with the number 226 cases. Half of the percentage of outbreak cases that occurred in Soe City with a number of cases is 134 cases. Spatial analysis can be used to see patterns of disease distribution in certain areas.Methods: This research is a type of descriptive research with a case study approach. This descriptive research was carried out using a survey method where there was no intervention on variables but simply observing natural phenomena or looking for relationships between these phenomena and other variables.Results: The research of dengue case data is divided into univariate analysis and spatial analysis, for example, classification, buffering and Moran index. Environmental factors in the form of the existence and condition of water reservoirs with dengue fever incidents can be seen in data related to the number of water reservoirs used by the community which are left open and the number is >3, making it easier for mosquitoes to breed. In the Spatial Classification Analysis, Nonohonis Village has the highest level of risk, but Autocorrelation Analysis states that the Oekefan area has larger cluster points than Nonohonis Village. Furthermore, environmental factors include the existence and condition of dug wells. at a depth of ≤15m with open conditions makes it easier for mosquitoes to breed. Apart from that, based on the buffer data above, it can be seen that at a radius of <100m it is 3 times larger than a radius of 100 to 300m and 2.7 times larger than a radius of 300m to 500m. Environmental factors include the existence and condition of waste water drainage channels (SPAL) with dengue fever incidents. Based on the buffer data above, it can be seen that at a radius of <100m it is 0.6 times greater than the radius from 100 to 300m and 0.8 times greater than the radius from 300m to 500m.Conclusion: It is necessary to control mosquito breeding in water reservoirs and dug wells through education regarding malaria risk factors in Soe City.

The Environmental Health Risk Analysis regarding Hepatitis A Transmission among Street Food Vendor in Indonesia

This study aimed to conduct hazard identification and risk assessment for the transmission of hepatitis A among street food vendors (SFVs), whereas risk management was generated. This observational analytic study was conducted in Jember Regency - Indonesia. Cluster random sampling was employed, wherein five distinct locus were selected representing SFVs in campus area and local market area. A total of 100 SFVs in Jember participated in this study. Data was collected using a questionnaire. The risk assessment was measured by multiplying the likelihood and consequence. Additionally, the data was subjected to descriptive analysis. This study found the identification of hazards among SFVs was found inadequate sanitation facilities, poor food processing practice (improper handling of raw ,- cooked ingredients, and poor food serving), limited availability of clean water,substandard building and layout were observed as potential hazards for the transmission of hepatitis A. The risk assessment found inadequate sanitation facilities (18 point), negative attitude (18 point), poor quality assurance (16 point), and food contamination (14 point) have high scores. The risk management including: a) location and building: providing specific location, and maintaining cleanliness of the furniture and equipment on a regular basis, b) sanitation facility: provision of sanitary waste bin, communal toilet and wastewater drainage system; fly control measures, and using piped water supply, c) food processing: increasing food handler personal hygiene, and standard food handling process.In conclusion, the risk of Hepatitis A transmission among street vendors remains high and poses a threat in Jember, indicating the need for health education for the street vendors. Additionally, the author recommends policymakers to implement regular monitoring or inspection of the food quality and the necessity of providing clean water facilities or other fundamental facilities to SFVs.

Phylogenetic Profile of Nonulcerans and Nontuberculous Environmental Mycobacteria Isolated in Côte d'Ivoire.

Environmental mycobacteria are involved in several infections ranging from lung to skin infections. In Côte d'Ivoire, apart from Mycobacterium ulcerans and Mycobacterium tuberculosis, little information exists on other species. The culture of these species, a real challenge, especially in developing countries like Cote d'Ivoire, limits their identification. However, there are reports in literature of infections caused by these mycobacteria, and few species have never been described in human or animal infections. These are difficult cases to treat because of their resistance to most antituberculosis antibiotics. The aim of our work was to study the diversity of potentially pathogenic mycobacterial species in wastewater drainage channels in different townships and in two hospital effluents in the city of Abidjan. Wastewater samples were cultured, followed by conventional polymerase chain reaction (PCR) targeting mycobacterial 16S ribonucleic acid (16S RNA) using PA/MSHA primers. 16 S RNA identified were sequenced by Sanger techniques. Sequences obtained were analyzed, and a phylogenic tree was built. Fast-growing mycobacteria, including Mycobacterium fortuitum, Mycobacterium phocaicum, Mycobacterium sp., and others presence, were confirmed both by culture and molecular techniques. M. fortuitum strain was the same in effluents of the Treichville University Hospital and in the wastewater of the township of Koumassi. New species never isolated in Côte d'Ivoire, such as M. phocaicum, have been identified in wastewater of the township of Yopougon. This study showed that the sewer network in the city of Abidjan is colonized by both potentially pathogenic mycobacteria and saprophytic environmental mycobacteria.

Constructed wetland treating mine drainage wastewater: Performance and microbial mechanisms

To explore the possibility of using constructed wetlands to treat mine drainage wastewater, a lab- and pilot-scale constructed wetland with different filler units were built to study its effects on pollutants removal performances and microbial characteristics. The results showed that the removal efficiencies of ammonia nitrogen (NH4+-N), nitrate nitrogen (NO3-−N) and chemical oxygen demand (COD) in the mine drainage wastewater were 65.37 %, 77.92 % and 69.00 %, respectively, and ceramic filler functional unit showed better treatment performance. Achromobacter, Arthrobacter, and Pedobacter were the dominant microbial communities, in which Pedobacter would form Fe autotrophic denitrification process with Fe2+ in the mine drainage wastewater to further promote the removal of nitrogen. Besides, the highest abundance of denitrification-related genes (narG, nosB, nosZ), multifunctional genes (napA, napB), and the related enzymes in the N cycle and the TCA cycle ([E.C.1.7.2.4], [EC: 1.1.1.41], [EC: 1.2.7.3]) were formed by microorganisms on the surface of ceramic filler in the constructed wetland. This study could provide theoretical support for the treatment of mine drainage wastewater with constructed wetlands, and also provide a new idea for this field.

Operation Risk Simulation and Interaction Impact of Stormwater and Sewage Systems Based on Storm Water Management Model

With the increasing urbanization rate, higher demand is placed on drainage systems, necessitating analysis of their risk profiles. While many studies focus on the individual hydraulic modeling of stormwater and wastewater systems when considering operational risks, they often overlook the exacerbating effects of combined stormwater and wastewater flows on each other’s risks. In this study, we constructed a model of the combined stormwater and wastewater drainage system in Lijiao, Guangdong Province. We analyzed the operational risks of both stormwater and sewage networks in different scenarios, focusing on full-load pipes, overload pipes, node overflows, and minimum flow velocities. Furthermore, we compared the exacerbating effects of sewage and stormwater on each other’s network operational risks. Simulation results indicated that, for sewage networks with combined sewer sections, the lengths of full-load pipes and overload pipes increased by an average of 27.4% and 16.3%, respectively, during rainy weather scenarios compared to dry weather. After considering the inflow of sewage into combined sewer sections, the average length of full-load pipes increased by 3.8 km, overload pipe length increased by 1.1 km, and overflow volume increased by 2.26 × 104 m3. As the return period of rainfall events increases, these inter-system impacts gradually diminish. Therefore, when modeling drainage systems and assessing operational risks, particularly during low return period rainfall events, the inclusion of both stormwater and sewage in combined sewer networks should be comprehensively considered.

The impact of an intervention to reduce dispersal from wastewater drain sites on carbapenem-resistant Pseudomonas aeruginosa colonization and bloodstream infection on a hematopoietic cell transplant and hematologic malignancy unit.

To evaluate the impact of an intervention to limit dispersal from wastewater drain (WWD) sites on meropenem-nonsusceptible Pseudomonas aeruginosa patient and environmental colonization and bloodstream infection (BSI) on a hematopoietic cell transplant (HCT) and hematologic malignancy (HM) unit. This quasi-experimental study included pre/postintervention point-prevalence surveys in July 2019 and June 2020, respectively. The retrospective cohort included HCT/HM patients with P. aeruginosa BSI between 2012 and 2022. Adult HCT/HM unit at an academic center. This study included consenting HCT/HM patients on the unit at the time of the point-prevalence surveys. HCT/HM patients with P. aeruginosa BSI between 2012 and 2022. A quality improvement intervention targeting WWD sites was conceived and implemented on a HCT/HM unit. Pre and postintervention colonization samples were obtained from patients and environmental sites, cultivated on selective media, then characterized by susceptibility testing. Whole-genome sequencing and phylogenetic analysis were performed on select isolates. The impact of the intervention on colonization and BSI was evaluated, as was relatedness among isolates. Although colonization of WWD sites with meropenem-nonsusceptible P. aeruginosa was widespread before and after this intervention, we observed a substantial decline in patient colonization (prevalence rate ratio, 0.35; 95% confidence interval [CI], 0.04-3.12) and BSI (incidence rate ratio, 0.67; 95% CI, 0.31-1.42) after the intervention. Among 3 predominant sequence types (ST-111, ST-446, and ST-308), there was striking genetic conservation within groups and among environmental colonization, patient colonization, and BSI isolates. An intervention targeting WWD sites on a HCT/HM unit had a meaningful impact on meropenem-nonsusceptible P. aeruginosa patient colonization and BSI.