Tap WaterIndex

← California

Tap water quality report

Valley Water Co.

EPA monitoring tested this supplier for 80 contaminants and detected 21. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

80
contaminants tested
21
detected
10,070
people served
4
health-based violations
California rankingsLead in CaliforniaPFAS in California
Water source
SWP
Ownership
Private
Counties served
Los Angeles

Compliance record

Formal violations the EPA has on file for this supplier. A health-based violation means a contaminant limit or a required treatment was breached; the rest are monitoring or reporting failures — still violations, but not a measured health risk.

4
health-based violations
4
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Resolved 1994-06-01 → 1994-06-30
MCL Health-based Resolved 1994-06-01 → 1994-06-30
MCL Health-based Resolved 1992-09-01 → 1992-09-30
MCL Health-based Resolved 1992-09-01 → 1992-09-30

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 95th percentile of this system's samples — over 100% is worth reading, but is not by itself a violation. Where a single sample came in higher than that percentile, it is noted under the bar. Formal violations are listed separately.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
Nitrate
13108 µg/L 131%
of the EPA limit, at the 95th percentile of samples — 10000 µg/L
worst single sample: 15820 µg/L
890/892 SYR4 2012–2019
Tetrachloroethylene
3.12 µg/L 62%
of the EPA limit 5 µg/L
worst single sample: 5.6 µg/L
159/395 SYR4 2012–2019
Trichloroethylene
1.8 µg/L 36%
of the EPA limit 5 µg/L
worst single sample: 2.4 µg/L
143/395 SYR4 2012–2019
Nitrate-Nitrite
11050 µg/L 111%
of the EPA limit, at the 95th percentile of samples — 10000 µg/L
worst single sample: 1000000 µg/L
140/140 SYR4 2013–2019
TTHM
75.35 µg/L 94%
of the EPA limit 80 µg/L
worst single sample: 83 µg/L
72/282 SYR4 2012–2019
Dibromochloromethane
28 µg/L
No EPA limit set
worst single sample: 36 µg/L
71/290 SYR4 2012–2019
Bromoform
10.6 µg/L
No EPA limit set
worst single sample: 17 µg/L
69/290 SYR4 2012–2019
Bromodichloromethane
25.7 µg/L
No EPA limit set
worst single sample: 30 µg/L
67/290 SYR4 2012–2019
Chloroform
22.8 µg/L
No EPA limit set
worst single sample: 37 µg/L
65/290 SYR4 2012–2019
Dichloroacetic Acid
11 µg/L
No EPA limit set
worst single sample: 20 µg/L
64/64 SYR4 2012–2019
Total Haloacetic Acids (HAA5)
24.85 µg/L 41%
of the EPA limit 60 µg/L
worst single sample: 34 µg/L
64/64 SYR4 2012–2019
Dibromoacetic Acid
6.495 µg/L
No EPA limit set
worst single sample: 8.6 µg/L
62/64 SYR4 2012–2019
Trichloroacetic Acid
7.12 µg/L
No EPA limit set
worst single sample: 10 µg/L
60/64 SYR4 2012–2019
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
 37/37 LCR 2022
Fluoride
342 µg/L 8.6%
of the EPA limit 4000 µg/L
worst single sample: 370 µg/L
8/8 SYR4 2014–2017
Barium
180 µg/L 9%
of the EPA limit 2000 µg/L
 6/8 SYR4 2014–2017
Monobromoacetic Acid
1.8 µg/L
No EPA limit set
 6/64 SYR4 2012–2019
Combined Uranium
12.9481 µg/L 43%
of the EPA limit 30 µg/L
worst single sample: 13.261 µg/L
4/4 SYR4 2014–2017
Lithium
65.7 µg/L
No EPA limit set
 4/4 UCMR-5 2024
Monochloroacetic Acid
2.095 µg/L
No EPA limit set
worst single sample: 2.1 µg/L
2/64 SYR4 2012–2019
Mercury
1.4 µg/L 70%
of the EPA limit 2 µg/L
 1/8 SYR4 2014–2017
59 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalArsenicBenzeneBeryllium, TotalChlorobenzeneCopperCyanideCadmiumCarbon TetrachlorideChromiumDichloromethaneDi(2-ethylhexyl) PhthalateEthylbenzeneHfpo-DaNetfosaaNfdhaNmefosaaNitritePfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaSeleniumStyreneThallium, TotalTolueneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
FAN, BOB
Phone
818-790-5516
Email
[email protected]

Frequently asked questions about Valley Water Co.

Is Valley Water Co. tap water safe to drink?

EPA monitoring detected 21 contaminants in Valley Water Co.'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 Valley Water Co.'s water?

EPA monitoring detected Nitrate, Tetrachloroethylene, Trichloroethylene, Nitrate-Nitrite, TTHM, and others. The full list with the level and data source for each is above.

How many people does Valley Water Co. serve?

Valley Water Co. reports serving 10,070 people in California, per its EPA record.

Has Valley Water Co. had any water quality violations?

The EPA has 4 violations on file for Valley Water Co., of which 4 are health-based (a contaminant limit or required treatment was breached) and 0 remain open. The rest are monitoring or reporting failures.

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.