SAN JOSE WATER
CA · PWS ID CA4310011 · Community water system
113
contaminants tested
33
detected
1,039,920
people served
PFAS detected
“Forever chemicals” from UCMR-5 — the only fresh nationwide measurements (2023–2025).
| Contaminant | Max | Detection rate | Period |
|---|---|---|---|
| PFHxS | 0.0055 ug/L | 12/36 | 2025 |
| PFOS | 0.0062 ug/L | 2/37 | 2025 |
Other contaminants detected
| Contaminant | Max | Detection rate | Source | Period |
|---|---|---|---|---|
| Nitrate | 8200 UG/L | 1882/1932 | SYR4 | 2012–2019 |
| TTHM | 101.61 UG/L | 440/451 | SYR4 | 2012–2019 |
| Bromodichloromethane | 27.69 UG/L | 432/444 | SYR4 | 2012–2019 |
| Dibromochloromethane | 43.62 UG/L | 420/444 | SYR4 | 2012–2019 |
| Total Haloacetic Acids (HAA5) | 75.8 UG/L | 418/443 | SYR4 | 2012–2019 |
| Chloroform | 85.42 UG/L | 412/444 | SYR4 | 2012–2019 |
| Dichloroacetic Acid | 36 UG/L | 354/443 | SYR4 | 2012–2019 |
| Bromoform | 37.21 UG/L | 312/444 | SYR4 | 2012–2019 |
| Dibromoacetic acid | 30 UG/L | 293/443 | SYR4 | 2012–2019 |
| Trichloroacetic Acid | 44.3 UG/L | 289/443 | SYR4 | 2012–2019 |
| Fluoride | 890 UG/L | 262/341 | SYR4 | 2012–2019 |
| Barium | 330 UG/L | 182/273 | SYR4 | 2012–2019 |
| Nitrate-Nitrite | 1000000 UG/L | 141/162 | SYR4 | 2012–2019 |
| 1,1,1-Trichloroethane | 4.2 UG/L | 81/640 | SYR4 | 2012–2019 |
| 1,1-Dichloroethylene | 6.3 UG/L | 33/640 | SYR4 | 2012–2019 |
| Monobromoacetic acid | 2 UG/L | 32/443 | SYR4 | 2012–2019 |
| LEAD SUMMARY | 0.0090 mg/L | 28/28 | LCR | 2025 |
| Combined Uranium | 3.0396 UG/L | 16/50 | SYR4 | 2012–2019 |
| Selenium | 11 UG/L | 11/270 | SYR4 | 2012–2019 |
| Combined Radium (-226 and -228) | 2.6 PCI/L | 10/34 | SYR4 | 2012–2019 |
| Monochloroacetic acid | 6.94 UG/L | 6/443 | SYR4 | 2012–2019 |
| Arsenic | 5.7 UG/L | 5/272 | SYR4 | 2012–2019 |
| lithium | 10 ug/L | 5/41 | UCMR-5 | 2025 |
| Chromium | 29 UG/L | 4/360 | SYR4 | 2012–2019 |
| Asbestos | 0.2000 MFL | 3/76 | SYR4 | 2012–2019 |
| Gross Beta Particle Activity | 5.6 PCI/L | 3/11 | SYR4 | 2012–2019 |
| Lead | 17 UG/L | 3/270 | SYR4 | 2012–2019 |
| COPPER, FREE | 360 UG/L | 2/273 | SYR4 | 2012–2019 |
| Di(2-ethylhexyl) adipate | 0.2200 UG/L | 1/148 | SYR4 | 2012–2019 |
| Di(2-ethylhexyl) phthalate | 0.2900 UG/L | 1/148 | SYR4 | 2012–2019 |
| Styrene | 0.6900 UG/L | 1/640 | SYR4 | 2012–2019 |
80 contaminants tested, none detected
1,1,2-Trichloroethane1,2,4-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, TotalAtrazineBHC-GAMMABenzeneBenzo(a)pyreneBeryllium, TotalCHLOROBENZENECYANIDECadmiumCarbofuranCarbon tetrachlorideChlordaneDICHLOROMETHANEDalaponDinosebDiquatETHYLENE DIBROMIDEEndothallEndrinEthylbenzeneGlyphosateHEXACHLOROBENZENEHFPO-DAHeptachlorHeptachlor epoxideHexachlorocyclopentadieneLASSOMercuryMethoxychlorNEtFOSAANFDHANMeFOSAANitriteOXAMYLPFBAPFBSPFDAPFDoAPFEESAPFHpAPFHpSPFHxAPFMBAPFMPAPFNAPFOAPFPeAPFPeSPFTAPFTrDAPFUnAPentachlorophenolPicloramSimazineTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl chlorideXylenes, Totalcis-1,2-Dichloroethyleneo-Dichlorobenzenep-Dichlorobenzenetrans-1,2-Dichloroethylene