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Tap water quality report

Golden State Wc - Cowan Heights

EPA monitoring tested this supplier for 85 contaminants and detected 20. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

85
contaminants tested
20
detected
6,997
people served
0
health-based violations
California rankingsLead in CaliforniaPFAS in California
Water source
SWP
Ownership
Private
Counties served
Orange

Compliance record

No violations on file. The EPA has no formal drinking-water violations recorded for this supplier.

PFAS detected

PFAS are industrial “forever chemicals”. These are the EPA's latest nationwide test results (2023–2025).
ContaminantMaxDetection ratePeriod
Pfba 0.0069 µg/L 3/6 2025
Pfpea 0.0070 µg/L 2/6 2025

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.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
Nitrate
3118.8 µg/L 31%
of the EPA limit 10000 µg/L
 70/72 SYR4 2012–2019
Dibromochloromethane
23 µg/L
No EPA limit set
 64/65 SYR4 2012–2019
TTHM
69 µg/L 86%
of the EPA limit 80 µg/L
 64/65 SYR4 2012–2019
Bromoform
19 µg/L
No EPA limit set
 63/65 SYR4 2012–2019
Bromodichloromethane
21 µg/L
No EPA limit set
 59/65 SYR4 2012–2019
Chloroform
19 µg/L
No EPA limit set
 57/65 SYR4 2012–2019
Total Haloacetic Acids (HAA5)
27 µg/L 45%
of the EPA limit 60 µg/L
 56/65 SYR4 2012–2019
Dibromoacetic Acid
6.3 µg/L
No EPA limit set
 55/65 SYR4 2012–2019
Dichloroacetic Acid
11 µg/L
No EPA limit set
 50/65 SYR4 2012–2019
Trichloroacetic Acid
9.9 µg/L
No EPA limit set
 44/65 SYR4 2012–2019
Lead
0.0084 mg/L 56%
of the EPA limit 0.0150 mg/L
 30/30 LCR 2025
Monochloroacetic Acid
5.6 µg/L
No EPA limit set
 11/65 SYR4 2012–2019
Nitrate-Nitrite
2650 µg/L 27%
of the EPA limit 10000 µg/L
 8/8 SYR4 2016–2019
Monobromoacetic Acid
1.4 µg/L
No EPA limit set
 7/65 SYR4 2012–2019
Combined Uranium
6.9136 µg/L 23%
of the EPA limit 30 µg/L
 6/6 SYR4 2014–2019
Fluoride
310 µg/L 7.8%
of the EPA limit 4000 µg/L
 6/6 SYR4 2012–2018
Lithium
58.9 µg/L
No EPA limit set
 6/6 UCMR-5 2025
Barium
130 µg/L 6.5%
of the EPA limit 2000 µg/L
 4/8 SYR4 2012–2018
65 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalArsenicAtrazineBenzeneBeryllium, TotalChlorobenzeneCopperCyanideCadmiumCarbon TetrachlorideChromiumDichloromethaneEthylene DibromideEthylbenzeneHfpo-DaLassoLeadMercuryNetfosaaNfdhaNmefosaaNitritePFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpesPftaPftrdaPfunaSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
CASAS, ROBERTO
Phone
310-890-2804
Email
Roberto.Casas@gswater.com

Frequently asked questions about Golden State Wc - Cowan Heights

Is Golden State Wc - Cowan Heights tap water safe to drink?

EPA monitoring detected 20 contaminants in Golden State Wc - Cowan Heights'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 Golden State Wc - Cowan Heights's water?

EPA monitoring detected Nitrate, Dibromochloromethane, TTHM, Bromoform, Bromodichloromethane, and others. The full list with the level and data source for each is above.

How many people does Golden State Wc - Cowan Heights serve?

Golden State Wc - Cowan Heights reports serving 6,997 people in California, per its EPA record.

Has Golden State Wc - Cowan Heights had any water quality violations?

The EPA has no formal drinking-water violations on file for Golden State Wc - Cowan Heights.

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.