CITY OF GILROY
CA · PWS ID CA4310004 · Community water system
109
contaminants tested
21
detected
59,203
people served
PFAS detected
“Forever chemicals” from UCMR-5 — the only fresh nationwide measurements (2023–2025).
| Contaminant | Max | Detection rate | Period |
|---|---|---|---|
| PFHxA | 0.0070 ug/L | 6/14 | 2025 |
| PFOA | 0.0080 ug/L | 6/14 | 2025 |
| PFBS | 0.0094 ug/L | 5/14 | 2025 |
| PFPeA | 0.0078 ug/L | 5/14 | 2025 |
| PFHpA | 0.0036 ug/L | 1/14 | 2025 |
| PFHxS | 0.0035 ug/L | 1/14 | 2025 |
| PFOS | 0.0058 ug/L | 1/14 | 2025 |
Other contaminants detected
| Contaminant | Max | Detection rate | Source | Period |
|---|---|---|---|---|
| Nitrate | 10170 UG/L | 718/720 | SYR4 | 2012–2019 |
| Tetrachloroethylene | 3.5 UG/L | 80/284 | SYR4 | 2012–2019 |
| LEAD SUMMARY | 0.0120 mg/L | 45/45 | LCR | 2024 |
| TTHM | 13.51 UG/L | 31/32 | SYR4 | 2016–2019 |
| Bromoform | 11.88 UG/L | 30/32 | SYR4 | 2016–2019 |
| Fluoride | 170 UG/L | 18/27 | SYR4 | 2012–2018 |
| Barium | 140 UG/L | 15/27 | SYR4 | 2012–2018 |
| Dibromoacetic acid | 3.4 UG/L | 15/32 | SYR4 | 2016–2019 |
| Total Haloacetic Acids (HAA5) | 5.7 UG/L | 12/32 | SYR4 | 2016–2019 |
| Nitrate-Nitrite | 8500 UG/L | 9/9 | SYR4 | 2018 |
| lithium | 11 ug/L | 4/14 | UCMR-5 | 2025 |
| Dibromochloromethane | 1.78 UG/L | 2/32 | SYR4 | 2016–2019 |
| Dichloroacetic Acid | 3.8 UG/L | 2/32 | SYR4 | 2016–2019 |
| Trichloroacetic Acid | 1.9 UG/L | 2/32 | SYR4 | 2016–2019 |
88 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, TotalArsenicAtrazineBHC-GAMMABenzeneBenzo(a)pyreneBeryllium, TotalBromodichloromethaneCHLOROBENZENECOPPER, FREECYANIDECadmiumCarbofuranCarbon tetrachlorideChlordaneChloroformChromiumDICHLOROMETHANEDalaponDi(2-ethylhexyl) adipateDi(2-ethylhexyl) phthalateDinosebDiquatETHYLENE DIBROMIDEEndothallEndrinEthylbenzeneGlyphosateHEXACHLOROBENZENEHFPO-DAHeptachlorHeptachlor epoxideHexachlorocyclopentadieneLASSOLeadMercuryMethoxychlorMonobromoacetic acidMonochloroacetic acidNEtFOSAANFDHANMeFOSAANitriteOXAMYLPFBAPFDAPFDoAPFEESAPFHpSPFMBAPFMPAPFNAPFPeSPFTAPFTrDAPFUnAPentachlorophenolPicloramSeleniumSimazineStyreneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl chlorideXylenes, Totalcis-1,2-Dichloroethyleneo-Dichlorobenzenep-Dichlorobenzenetrans-1,2-Dichloroethylene
Areas served
GILROY