Analysis of Groundwater Quality in Dusun Salam and Randuacir, Argomulyo District

Abstract

Groundwater quality is very much influenced by soil type, soil content, and water flow pattern in the soil. Dusun Salem and Randuacir are hamlets not far from the final garbage dump in Salatiga. This research was conducted to determine the condition of groundwater in Salam and Randuacir hamlets, Randuacir Village, Argomulyo District. The samples were taken as many as 19 wells and the sampling was done randomly by disproportional stratification. To determine water quality, the data from the measurement results of heavy metals [Copper (Cu2+), Manganese (Mn2+), and Zinc (Zn2+], chemical and bacteriological parameters of well water are compared with drinking water quality standards according to Government Regulation No. 82 of 2001 concerning Water Quality Management and Water Pollution Control. Meanwhile, the physical parameters are compared with the Regulation of the Minister of Health of the Republic of Indonesia Number 32 of 2017 concerning Environmental Health Quality Standards and Water Health Requirements for Hygiene, Swimming Pools, Solus Per Aqua, and Public Baths. To determine the level of groundwater pollution, the Pollution Index (IP) is used according to the Decree of the State Minister for the Environment No. 115 of 2003. Based on the results of the study, it can be concluded that: 1) Of the 19 wells in Salam and Randuacir hamlets, there are 3 wells (15.79 %) contaminated with Cu2+, Mn2+, and Zn2+, 2 wells (10.53%) were contaminated with Cu2+ and Zn2+, 6 wells (31.58%) were contaminated with Mn2+ and Zn2+, and the remaining 8 wells (42.10%) were contaminated with Zn2+; 2) Based on the pollution index (IP) of the 19 wells studied that are within a radius of less than 1 km and more than 1 km, all wells are lightly polluted (100%).