CITY OF MERCED
CA · PWS ID CA2410009 · Community water system
112
contaminants tested
21
detected
93,692
people served
PFAS detected
“Forever chemicals” from UCMR-5 — the only fresh nationwide measurements (2023–2025).
| Contaminant | Max | Detection rate | Period |
|---|---|---|---|
| PFHxS | 0.0150 ug/L | 7/42 | 2024 |
| PFHxA | 0.0048 ug/L | 4/42 | 2024 |
| PFOS | 0.0089 ug/L | 4/42 | 2024 |
| PFOA | 0.0061 ug/L | 3/42 | 2024 |
Other contaminants detected
| Contaminant | Max | Detection rate | Source | Period |
|---|---|---|---|---|
| Nitrate | 16498 UG/L | 1304/1304 | SYR4 | 2012–2019 |
| Arsenic | 10 UG/L | 785/840 | SYR4 | 2012–2019 |
| Fluoride | 720 UG/L | 62/83 | SYR4 | 2014–2019 |
| Barium | 510 UG/L | 61/62 | SYR4 | 2014–2019 |
| Tetrachloroethylene | 3.7 UG/L | 50/873 | SYR4 | 2012–2019 |
| Nitrate-Nitrite | 5300 UG/L | 40/40 | SYR4 | 2016–2019 |
| LEAD SUMMARY | 0.0070 mg/L | 28/28 | LCR | 2024 |
| Trichloroethylene | 1.1 UG/L | 22/864 | SYR4 | 2012–2019 |
| TTHM | 12 UG/L | 17/94 | SYR4 | 2012–2019 |
| Gross Beta Particle Activity | 11 PCI/L | 15/20 | SYR4 | 2016–2017 |
| Combined Uranium | 12.963 UG/L | 11/21 | SYR4 | 2016–2017 |
| DICHLOROMETHANE | 4.5 UG/L | 9/864 | SYR4 | 2012–2019 |
| Chloroform | 12 UG/L | 5/94 | SYR4 | 2012–2019 |
| 1,2-DIBROMO-3-CHLOROPROPANE | 0.0140 UG/L | 1/80 | SYR4 | 2012–2019 |
| Bromodichloromethane | 2.6 UG/L | 1/94 | SYR4 | 2012–2019 |
| Bromoform | 1.6 UG/L | 1/94 | SYR4 | 2012–2019 |
| Dibromochloromethane | 3 UG/L | 1/94 | SYR4 | 2012–2019 |
91 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-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 tetrachlorideChlordaneChromiumDalaponDi(2-ethylhexyl) adipateDi(2-ethylhexyl) phthalateDibromoacetic acidDichloroacetic AcidDinosebDiquatETHYLENE DIBROMIDEEndothallEndrinEthylbenzeneGlyphosateHEXACHLOROBENZENEHFPO-DAHeptachlorHeptachlor epoxideHexachlorocyclopentadieneLASSOLeadMercuryMethoxychlorMonobromoacetic acidMonochloroacetic acidNEtFOSAANFDHANMeFOSAANitriteOXAMYLPFBAPFBSPFDAPFDoAPFEESAPFHpAPFHpSPFMBAPFMPAPFNAPFPeAPFPeSPFTAPFTrDAPFUnAPentachlorophenolPicloramSeleniumSimazineStyreneThallium, TotalTolueneTotal Haloacetic Acids (HAA5)Total Polychlorinated Biphenyls (PCB)ToxapheneTrichloroacetic AcidVinyl chlorideXylenes, Totalcis-1,2-Dichloroethylenelithiumo-Dichlorobenzenep-Dichlorobenzenetrans-1,2-Dichloroethylene
Areas served
MERCED