Compliance record
Other contaminants detected
Each bar shows the measured level as a share of the EPA limit: green is
well under, amber is close to it, red is over. For lead and copper the
limit applies to exactly the 90th-percentile figure shown, so red there
means a real exceedance. For everything else the limit applies to a
running annual average while the figure is the single worst sample on
record — over 100% is worth reading, but is not by itself a violation.
Formal violations are listed separately.
| Contaminant | Level vs EPA limit | Detection rate | Source | Period |
|---|---|---|---|---|
| Nitrate | 135000 µg/L 1350% of the EPA limit, in the worst sample — 10000 µg/L | 7054/7102 | SYR4 | 2012–2019 |
| Trichloroethylene | 35 µg/L 700% of the EPA limit, in the worst sample — 5 µg/L | 308/775 | SYR4 | 2012–2019 |
| Barium | 330 µg/L 17% of the EPA limit 2000 µg/L | 179/197 | SYR4 | 2012–2019 |
| Chromium | 89 µg/L 89% of the EPA limit 100 µg/L | 146/170 | SYR4 | 2012–2019 |
| Combined Uranium | 36.803 µg/L 123% of the EPA limit, in the worst sample — 30 µg/L | 139/145 | SYR4 | 2013–2019 |
| Fluoride | 1300 µg/L 33% of the EPA limit 4000 µg/L | 124/150 | SYR4 | 2012–2019 |
| Arsenic | 13 µg/L 130% of the EPA limit, in the worst sample — 10 µg/L | 79/215 | SYR4 | 2012–2019 |
| Selenium | 9.8 µg/L 20% of the EPA limit 50 µg/L | 63/170 | SYR4 | 2012–2019 |
| cis-1,2-Dichloroethylene | 1.5 µg/L 2.1% of the EPA limit 70 µg/L | 45/339 | SYR4 | 2012–2019 |
| Copper | 16.7 µg/L 1.3% of the EPA limit 1300 µg/L | 39/170 | SYR4 | 2012–2019 |
| 1,1-Dichloroethylene | 0.6400 µg/L 9.1% of the EPA limit 7 µg/L | 14/339 | SYR4 | 2012–2019 |
| Nitrite | 360 µg/L 36% of the EPA limit 1000 µg/L | 10/151 | SYR4 | 2012–2019 |
| Nitrate-Nitrite | 49000 µg/L 490% of the EPA limit, in the worst sample — 10000 µg/L | 4/4 | SYR4 | 2017 |
| Bromoform | 2.4 µg/L No EPA limit set | 2/150 | SYR4 | 2012–2019 |
| Dibromochloromethane | 2.2 µg/L No EPA limit set | 2/150 | SYR4 | 2012–2019 |
| TTHM | 6 µg/L 7.5% of the EPA limit 80 µg/L | 2/16 | SYR4 | 2013–2019 |
| 1,2-DIBROMO-3-CHLOROPROPANE | 0.0200 µg/L 10% of the EPA limit 0.2000 µg/L | 1/131 | SYR4 | 2012–2019 |
| Bromodichloromethane | 1.1 µg/L No EPA limit set | 1/150 | SYR4 | 2012–2019 |
| Dichloromethane | 1.1 µg/L 22% of the EPA limit 5 µg/L | 1/339 | SYR4 | 2012–2019 |
| Lead | 0.8000 µg/L 5.3% of the EPA limit 15 µg/L | 1/170 | SYR4 | 2012–2019 |
| Monochloroacetic Acid | 6.4 µg/L No EPA limit set | 1/19 | SYR4 | 2013–2019 |
| Total Haloacetic Acids (HAA5) | 6.4 µg/L 11% of the EPA limit 60 µg/L | 1/19 | SYR4 | 2013–2019 |
58 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,2,4-Trichlorobenzene1,2-Dichloroethane1,2-Dichloropropane2,3,7,8-TCDD2,4,5-TP2,4-DAntimony, TotalAsbestosAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneChloroformDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDibromoacetic AcidDichloroacetic AcidDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidOxamylPentachlorophenolPicloramSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroacetic AcidVinyl ChlorideXylenes, TotalO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene
Utility contact
Frequently asked questions about Chino Basin Desalter Auth. - Desalter 1
Is Chino Basin Desalter Auth. - Desalter 1 tap water safe to drink?
EPA monitoring detected 22 contaminants in Chino Basin Desalter Auth. - Desalter 1's water. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and the utility's annual Consumer Confidence Report for its official compliance status.
What contaminants were detected in Chino Basin Desalter Auth. - Desalter 1's water?
EPA monitoring detected Nitrate, Trichloroethylene, Barium, Chromium, Combined Uranium, and others. The full list with the level and data source for each is above.
How many people does Chino Basin Desalter Auth. - Desalter 1 serve?
Chino Basin Desalter Auth. - Desalter 1 reports serving 0 people in California, per its EPA record.
Has Chino Basin Desalter Auth. - Desalter 1 had any water quality violations?
The EPA has no formal drinking-water violations on file for Chino Basin Desalter Auth. - Desalter 1.
Where does this data come from?
Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.