CITY OF GRIDLEY
CA · PWS ID CA0410004 · Community water system
86
contaminants tested
20
detected
7,269
people served
PFAS detected
“Forever chemicals” from UCMR-5 — the only fresh nationwide measurements (2023–2025).
| Contaminant | Max | Detection rate | Period |
|---|---|---|---|
| PFHpA | 0.0035 ug/L | 2/10 | 2024 |
| PFHxA | 0.0053 ug/L | 2/10 | 2024 |
| PFHxS | 0.0128 ug/L | 2/10 | 2024 |
| PFNA | 0.0099 ug/L | 2/10 | 2024 |
| PFOS | 0.0105 ug/L | 2/10 | 2024 |
| PFPeA | 0.0065 ug/L | 2/10 | 2024 |
Other contaminants detected
| Contaminant | Max | Detection rate | Source | Period |
|---|---|---|---|---|
| Fluoride | 1400 UG/L | 105/116 | SYR4 | 2012–2019 |
| Nitrate | 5200 UG/L | 92/94 | SYR4 | 2012–2019 |
| LEAD SUMMARY | 0.0060 mg/L | 22/22 | LCR | 2023 |
| Arsenic | 14.2 UG/L | 19/19 | SYR4 | 2012–2019 |
| Barium | 69.5 UG/L | 8/10 | SYR4 | 2012–2019 |
| Nitrite | 260 UG/L | 6/17 | SYR4 | 2012–2019 |
| TTHM | 5.9 UG/L | 4/7 | SYR4 | 2014–2019 |
| Bromoform | 5.9 UG/L | 3/7 | SYR4 | 2014–2019 |
| Chromium | 11 UG/L | 3/9 | SYR4 | 2013–2019 |
| Bromodichloromethane | 1 UG/L | 2/7 | SYR4 | 2014–2019 |
| Dibromoacetic acid | 1 UG/L | 2/6 | SYR4 | 2014–2019 |
| Dibromochloromethane | 1 UG/L | 2/7 | SYR4 | 2014–2019 |
| Total Haloacetic Acids (HAA5) | 1 UG/L | 2/6 | SYR4 | 2014–2019 |
| Nitrate-Nitrite | 1400 UG/L | 1/1 | SYR4 | 2018 |
66 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS2,4-D4:2 FTS6:2 FTS8:2 FTS9Cl-PF3ONSADONAAntimony, TotalAtrazineBenzeneBeryllium, TotalCHLOROBENZENECOPPER, FREECadmiumCarbofuranCarbon tetrachlorideChloroformDICHLOROMETHANEDichloroacetic AcidDinosebDiquatEndothallEthylbenzeneGlyphosateHFPO-DALeadMercuryMonobromoacetic acidMonochloroacetic acidNEtFOSAANFDHANMeFOSAAPFBAPFBSPFDAPFDoAPFEESAPFHpSPFMBAPFMPAPFOAPFPeSPFTAPFTrDAPFUnASeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTrichloroacetic AcidTrichloroethyleneVinyl chlorideXylenes, Totalcis-1,2-Dichloroethylenelithiumo-Dichlorobenzenep-Dichlorobenzenetrans-1,2-Dichloroethylene
Areas served
GRIDLEY