On two days during 2000, Riverside provided water that was greater than half the MCL, but did not exceed 45 ppm. The California Department of Health Services has set the MCL for nitrate at 45 ppm. Riverside has 48 wells that are blended to comply with drinking water standards. The city conducts extensive monitoring of the blend operations. Seasonal variation in demand and flow in addition to system maintenance and repair impact the nitrate levels during the year.
Riverside strives to provide the best quality water possible from our water resources.
The ICR data will assist EPA in setting future disinfection by-product regulations. Results based on the finish water entry point to the distribution system. There are no federal and state standards at this time for these constituents. Unregulated contaminant monitoring helps EPA and the California Department of Health Services to determine where certain contaminants occur and whether the contaminants need to be regulated. California has sent a provisional action level for perchlorate of 18 ppb.