RANCHO CALIFORNIA WATER DISTRICT
CA · PWS ID CA3310038 · Community water system
110
contaminants tested
31
detected
146,147
people served
PFAS detected
“Forever chemicals” from UCMR-5 — the only fresh nationwide measurements (2023–2025).
| Contaminant | Max | Detection rate | Period |
|---|---|---|---|
| PFOA | 0.0110 ug/L | 8/77 | 2024 |
| PFOS | 0.0160 ug/L | 6/77 | 2024 |
| PFBS | 0.0073 ug/L | 5/77 | 2024 |
| PFHxA | 0.0066 ug/L | 5/77 | 2024 |
| PFBA | 0.0078 ug/L | 4/77 | 2024 |
| PFPeA | 0.0077 ug/L | 4/77 | 2024 |
| PFHxS | 0.0067 ug/L | 3/77 | 2024 |
| PFHpA | 0.0033 ug/L | 1/77 | 2024 |
Other contaminants detected
| Contaminant | Max | Detection rate | Source | Period |
|---|---|---|---|---|
| Nitrate | 6600 UG/L | 1116/1270 | SYR4 | 2012–2019 |
| Fluoride | 6400 UG/L | 1065/1066 | SYR4 | 2012–2019 |
| Arsenic | 24 UG/L | 889/1434 | SYR4 | 2012–2019 |
| Chloroform | 19 UG/L | 134/139 | SYR4 | 2014–2019 |
| Bromoform | 41 UG/L | 120/125 | SYR4 | 2012–2019 |
| Dibromochloromethane | 30 UG/L | 120/125 | SYR4 | 2012–2019 |
| TTHM | 92 UG/L | 120/120 | SYR4 | 2014–2019 |
| Bromodichloromethane | 27 UG/L | 117/125 | SYR4 | 2012–2019 |
| Barium | 640 UG/L | 97/151 | SYR4 | 2012–2019 |
| Total Haloacetic Acids (HAA5) | 41 UG/L | 96/120 | SYR4 | 2014–2019 |
| Dibromoacetic acid | 9 UG/L | 91/120 | SYR4 | 2014–2019 |
| Trichloroacetic Acid | 5.6 UG/L | 65/120 | SYR4 | 2014–2019 |
| Dichloroacetic Acid | 6.5 UG/L | 57/120 | SYR4 | 2014–2019 |
| Combined Uranium | 11.0409 UG/L | 50/52 | SYR4 | 2013–2019 |
| LEAD SUMMARY | 0.0050 mg/L | 35/35 | LCR | 2025 |
| Chromium | 4.2 UG/L | 33/151 | SYR4 | 2012–2019 |
| Monobromoacetic acid | 2.8 UG/L | 25/120 | SYR4 | 2014–2019 |
| Monochloroacetic acid | 36 UG/L | 16/120 | SYR4 | 2014–2019 |
| lithium | 44 ug/L | 15/78 | UCMR-5 | 2024 |
| Selenium | 6.9 UG/L | 5/151 | SYR4 | 2012–2019 |
| DICHLOROMETHANE | 0.6900 UG/L | 1/144 | SYR4 | 2012–2019 |
| Nitrite | 120 UG/L | 1/151 | SYR4 | 2012–2019 |
| Pentachlorophenol | 0.3300 UG/L | 1/68 | SYR4 | 2012–2019 |
79 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS2,3,7,8-TCDD2,4,5-TP2,4-D4:2 FTS6:2 FTS8:2 FTS9Cl-PF3ONSADONAAntimony, TotalAsbestosAtrazineBHC-GAMMABenzeneBenzo(a)pyreneBeryllium, TotalCHLOROBENZENECOPPER, FREECYANIDECadmiumCarbofuranCarbon tetrachlorideChlordaneDalaponDi(2-ethylhexyl) adipateDi(2-ethylhexyl) phthalateDinosebDiquatETHYLENE DIBROMIDEEndothallEndrinEthylbenzeneGlyphosateHEXACHLOROBENZENEHFPO-DAHeptachlorHeptachlor epoxideHexachlorocyclopentadieneLASSOLeadMercuryMethoxychlorNEtFOSAANFDHANMeFOSAAOXAMYLPFDAPFDoAPFEESAPFHpSPFMBAPFMPAPFNAPFPeSPFTAPFTrDAPFUnAPicloramSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl chlorideXylenes, Totalcis-1,2-Dichloroethyleneo-Dichlorobenzenep-Dichlorobenzenetrans-1,2-Dichloroethylene