RIPON, CITY OF
CA · PWS ID CA3910007 · Community water system
94
contaminants tested
24
detected
15,741
people served
PFAS detected
“Forever chemicals” from UCMR-5 — the only fresh nationwide measurements (2023–2025).
| Contaminant | Max | Detection rate | Period |
|---|---|---|---|
| PFHxS | 0.0035 ug/L | 2/10 | 2025 |
| PFOA | 0.0052 ug/L | 2/10 | 2025 |
| PFOS | 0.0120 ug/L | 2/10 | 2025 |
Other contaminants detected
| Contaminant | Max | Detection rate | Source | Period |
|---|---|---|---|---|
| Nitrate | 12000 UG/L | 438/438 | SYR4 | 2012–2019 |
| TTHM | 7 UG/L | 48/115 | SYR4 | 2012–2019 |
| LEAD SUMMARY | 0.0050 mg/L | 34/34 | LCR | 2023 |
| Bromoform | 2.8 UG/L | 30/116 | SYR4 | 2012–2019 |
| Dibromochloromethane | 2.7 UG/L | 23/117 | SYR4 | 2012–2019 |
| Arsenic | 19.7 UG/L | 18/18 | SYR4 | 2012–2018 |
| Chloroform | 5 UG/L | 18/118 | SYR4 | 2012–2019 |
| Barium | 228 UG/L | 16/17 | SYR4 | 2012–2018 |
| Bromodichloromethane | 1.7 UG/L | 15/118 | SYR4 | 2012–2019 |
| Chromium | 12.2 UG/L | 12/17 | SYR4 | 2012–2018 |
| Fluoride | 200 UG/L | 11/17 | SYR4 | 2012–2018 |
| Combined Uranium | 26.671 UG/L | 8/10 | SYR4 | 2012–2018 |
| Total Haloacetic Acids (HAA5) | 2.1 UG/L | 7/98 | SYR4 | 2013–2019 |
| cis-1,2-Dichloroethylene | 5.4 UG/L | 6/23 | SYR4 | 2012–2019 |
| 1,2-DIBROMO-3-CHLOROPROPANE | 0.0430 UG/L | 5/26 | SYR4 | 2012–2019 |
| Trichloroethylene | 1.6 UG/L | 5/23 | SYR4 | 2012–2019 |
| Trichloroacetic Acid | 1.4 UG/L | 4/96 | SYR4 | 2013–2019 |
| Dibromoacetic acid | 2.1 UG/L | 2/96 | SYR4 | 2013–2019 |
| lithium | 9.93 ug/L | 2/10 | UCMR-5 | 2025 |
| 1,2,4-Trichlorobenzene | 3.1 UG/L | 1/20 | SYR4 | 2012–2019 |
| Dichloroacetic Acid | 1.5 UG/L | 1/97 | SYR4 | 2013–2019 |
70 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS4:2 FTS6:2 FTS8:2 FTS9Cl-PF3ONSADONAAntimony, TotalAtrazineBHC-GAMMABenzeneBeryllium, TotalCHLOROBENZENECOPPER, FREECadmiumCarbon tetrachlorideChlordaneDICHLOROMETHANEETHYLENE DIBROMIDEEndothallEndrinEthylbenzeneHEXACHLOROBENZENEHFPO-DAHeptachlorHeptachlor epoxideHexachlorocyclopentadieneLASSOLeadMercuryMethoxychlorMonobromoacetic acidMonochloroacetic acidNEtFOSAANFDHANMeFOSAANitritePFBAPFBSPFDAPFDoAPFEESAPFHpAPFHpSPFHxAPFMBAPFMPAPFNAPFPeAPFPeSPFTAPFTrDAPFUnASeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneVinyl chlorideXylenes, Totalo-Dichlorobenzenep-Dichlorobenzenetrans-1,2-Dichloroethylene
Areas served
RIPON