Annual Water Quality Report — 2025

CITY OF RIVERTON · CALIFORNIA Public Works Department, Water Division Consumer Confidence Report 2025 · June 15, 2026 Annual Water Quality Report — 2025 Riverton's water met every state and federal drinking water standard in 2025. About 70 percent of our supply is groundwater from four city wells; the remainder is treated surface water purchased from the regional water district. Detected contaminants Contaminant Units Limit (MCL) Riverton average Range Typical source Nitrate (as N) mg/L 10 2.8 1.1–4.6 Fertilizer runoff, septic systems Arsenic ug/L 10 3.1 ND–6.2 Natural deposits Fluoride mg/L 2.0 0.7 0.6–0.8 Water additive for dental health Total trihalomethanes ug/L 80 24 11–39 Disinfection byproduct Gross alpha pCi/L 15 2.4 ND–4.9 Natural deposits Total dissolved solids mg/L 1000 412 290–560 Natural deposits Lead and copper Thirty homes were sampled in 2025. The 90th-percentile lead level was 2.1 ug/L against an action level of 15; no sample exceeded the action level. The City's service-line inventory found no lead service lines; 214 lines of unknown material will be verified by 2027. ND = not detected. A full table of all monitored contaminants, including those not detected, is available from the Water Division. City of Riverton · Consumer Confidence Report 2025 Page 1 of 1 Synthetic demonstration record. The City of Riverton is fictional.