CONTRA COSTA WATER DISTRICT
CA · PWS ID CA0710003 · Community water system
113
contaminants tested
30
detected
198,000
people served
Other contaminants detected
| Contaminant | Max | Detection rate | Source | Period |
|---|---|---|---|---|
| Fluoride | 900 UG/L | 192/325 | SYR4 | 2012–2019 |
| Nitrate | 4859 UG/L | 130/720 | SYR4 | 2012–2019 |
| Arsenic | 17 UG/L | 58/82 | SYR4 | 2012–2019 |
| LEAD SUMMARY | 0.0830 mg/L | 54/54 | LCR | 2025 |
| Chloroform | 13 UG/L | 50/50 | SYR4 | 2012–2019 |
| Dibromochloromethane | 18 UG/L | 50/50 | SYR4 | 2012–2019 |
| TTHM | 44 UG/L | 50/50 | SYR4 | 2012–2019 |
| Bromodichloromethane | 14 UG/L | 49/50 | SYR4 | 2012–2019 |
| Total Haloacetic Acids (HAA5) | 12 UG/L | 47/47 | SYR4 | 2012–2019 |
| Dichloroacetic Acid | 7.9 UG/L | 42/47 | SYR4 | 2012–2019 |
| Bromoform | 16 UG/L | 34/50 | SYR4 | 2012–2019 |
| Dibromoacetic acid | 5 UG/L | 28/47 | SYR4 | 2012–2019 |
| Gross Beta Particle Activity | 65 PCI/L | 15/33 | SYR4 | 2012–2019 |
| Bromate | 16 UG/L | 10/67 | SYR4 | 2012–2019 |
| Barium | 160 UG/L | 9/82 | SYR4 | 2012–2019 |
| Trichloroacetic Acid | 4.2 UG/L | 8/47 | SYR4 | 2012–2019 |
| Combined Uranium | 1.39315 UG/L | 7/44 | SYR4 | 2012–2019 |
| DICHLOROMETHANE | 3.4 UG/L | 7/104 | SYR4 | 2012–2019 |
| Nitrate-Nitrite | 1100 UG/L | 5/25 | SYR4 | 2013–2019 |
| COPPER, FREE | 320 UG/L | 4/84 | SYR4 | 2012–2019 |
| CYANIDE | 1.6 UG/L | 3/82 | SYR4 | 2012–2019 |
| Lead | 2.8 UG/L | 3/80 | SYR4 | 2012–2019 |
| Asbestos | 0.2000 MFL | 2/71 | SYR4 | 2012–2019 |
| Cadmium | 1.6 UG/L | 2/82 | SYR4 | 2012–2019 |
| Chromium | 30 UG/L | 2/82 | SYR4 | 2012–2019 |
| Di(2-ethylhexyl) phthalate | 0.3900 UG/L | 2/70 | SYR4 | 2012–2019 |
| Monobromoacetic acid | 2.6 UG/L | 2/47 | SYR4 | 2012–2019 |
| Nitrite | 520 UG/L | 2/338 | SYR4 | 2012–2019 |
| Selenium | 38 UG/L | 2/82 | SYR4 | 2012–2019 |
| Di(2-ethylhexyl) adipate | 0.2100 UG/L | 1/70 | SYR4 | 2012–2019 |
83 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, TotalAtrazineBHC-GAMMABenzeneBenzo(a)pyreneBeryllium, TotalCHLOROBENZENECarbofuranCarbon tetrachlorideChlordaneDalaponDinosebDiquatETHYLENE DIBROMIDEEndothallEndrinEthylbenzeneGlyphosateHEXACHLOROBENZENEHFPO-DAHeptachlorHeptachlor epoxideHexachlorocyclopentadieneLASSOMercuryMethoxychlorMonochloroacetic acidNEtFOSAANFDHANMeFOSAAOXAMYLPFBAPFBSPFDAPFDoAPFEESAPFHpAPFHpSPFHxAPFHxSPFMBAPFMPAPFNAPFOAPFOSPFPeAPFPeSPFTAPFTrDAPFUnAPentachlorophenolPicloramSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl chlorideXylenes, Totalcis-1,2-Dichloroethylenelithiumo-Dichlorobenzenep-Dichlorobenzenetrans-1,2-Dichloroethylene