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Twentynine Palms, CA

EPA monitoring detected 20 contaminants across the 2 water suppliers serving Twentynine Palms. A detection doesn't automatically mean the water is unsafe — see the level at the main supplier for each below, with its EPA source and period.

2
water suppliers
34,862
people served
20
contaminants found
California rankings Lead in California PFAS in California

What was found in Twentynine Palms's water

The level at the city's main supplier, the highest level anywhere in the city, the EPA limit for each, and where every figure comes from.

ContaminantLevel vs EPA limitSuppliersSource
Nitrate
7458 µg/L 75%
of the EPA limit 10000 µg/L
Main supplier: TWENTYNINE PALMS WATER DISTRICT · 18,795 people · 2019
2/2 SYR4
Fluoride
5800 µg/L 145%
of the EPA limit, at the 95th percentile of samples — 4000 µg/L
Main supplier: TWENTYNINE PALMS WATER DISTRICT · 18,795 people · 2019
2/2 SYR4
Nitrate-Nitrite
3520 µg/L 35%
of the EPA limit 10000 µg/L
Main supplier: TWENTYNINE PALMS WATER DISTRICT · 18,795 people · 2019
1/2 SYR4
Copper
234 µg/L 18%
of the EPA limit 1300 µg/L
Highest in the city: USMC - 29 PALMS · 16,067 people · 2018
1/2 SYR4
Lithium
46.5 µg/L
No EPA limit set
Main supplier: TWENTYNINE PALMS WATER DISTRICT · 18,795 people · 2025
1/2 UCMR-5
Barium
43.5 µg/L 2.2%
of the EPA limit 2000 µg/L
Highest in the city: USMC - 29 PALMS · 16,067 people · 2019
1/2 SYR4
Combined Uranium
31.29 µg/L 104%
of the EPA limit, at the 95th percentile of samples — 30 µg/L
Main supplier: TWENTYNINE PALMS WATER DISTRICT · 18,795 people · 2019
1/2 SYR4
Chromium
27.5 µg/L 28%
of the EPA limit 100 µg/L
Main supplier: TWENTYNINE PALMS WATER DISTRICT · 18,795 people · 2019
2/2 SYR4
TTHM
8.07 µg/L 10%
of the EPA limit 80 µg/L
Main supplier: TWENTYNINE PALMS WATER DISTRICT · 18,795 people · 2019
Highest in the city: 24 µg/L — USMC - 29 PALMS · 16,067 people · 2019
2/2 SYR4
Lead
19.6 µg/L 131%
of the EPA limit, at the 95th percentile of samples — 15 µg/L
Highest in the city: USMC - 29 PALMS · 16,067 people · 2018
1/2 SYR4
Bromoform
7.89 µg/L
No EPA limit set
Main supplier: TWENTYNINE PALMS WATER DISTRICT · 18,795 people · 2019
Highest in the city: 16.4 µg/L — USMC - 29 PALMS · 16,067 people · 2019
2/2 SYR4
Arsenic
16 µg/L 160%
of the EPA limit, at the 95th percentile of samples — 10 µg/L
Main supplier: TWENTYNINE PALMS WATER DISTRICT · 18,795 people · 2019
2/2 SYR4
Dibromochloromethane
1.3 µg/L
No EPA limit set
Main supplier: TWENTYNINE PALMS WATER DISTRICT · 18,795 people · 2019
Highest in the city: 5.465 µg/L — USMC - 29 PALMS · 16,067 people · 2019
2/2 SYR4
Total Haloacetic Acids (HAA5)
3.47 µg/L 5.8%
of the EPA limit 60 µg/L
Highest in the city: USMC - 29 PALMS · 16,067 people · 2019
1/2 SYR4
Dibromoacetic Acid
2.43 µg/L
No EPA limit set
Highest in the city: USMC - 29 PALMS · 16,067 people · 2019
1/2 SYR4
Bromodichloromethane
1.69 µg/L
No EPA limit set
Highest in the city: USMC - 29 PALMS · 16,067 people · 2019
1/2 SYR4
Monobromoacetic Acid
1 µg/L
No EPA limit set
Highest in the city: USMC - 29 PALMS · 16,067 people · 2019
1/2 SYR4
Asbestos
0.1900 MFL 2.7%
of the EPA limit 7 MFL
Highest in the city: USMC - 29 PALMS · 16,067 people · 2019
1/2 SYR4
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
Main supplier: TWENTYNINE PALMS WATER DISTRICT · 18,795 people · 2023
Highest in the city: 0.0200 mg/L — USMC - 29 PALMS · 16,067 people · 2024
2/2 LCR
Bromate
0.0088 µg/L 0.1%
of the EPA limit 10 µg/L
Highest in the city: USMC - 29 PALMS · 16,067 people · 2016
1/2 SYR4
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 the system's samples — over 100% is worth reading, but is not by itself a violation. Formal violations are listed separately. These are the utilities' own EPA-reported results, not a city-wide average. A detection means the lab measured the substance — it isn't the same as exceeding a legal limit. Hover a source tag to see the EPA program and years behind each figure.

Water suppliers serving Twentynine Palms

SupplierPopulation served
TWENTYNINE PALMS WATER DISTRICT 18,795
USMC - 29 PALMS 16,067

Frequently asked questions about Twentynine Palms tap water

Is Twentynine Palms tap water safe to drink?

EPA testing detected 20 contaminants in the water serving Twentynine Palms. A detection isn't the same as a violation — most detected levels are within federal limits. Check the level and source for each contaminant above, and your utility's annual Consumer Confidence Report for the official compliance status.

How many water suppliers serve Twentynine Palms?

2 public water suppliers report drinking-water monitoring for Twentynine Palms, California to the EPA. Each is listed above with its population served.

What contaminants are in Twentynine Palms's water?

The contaminants EPA monitoring detected in Twentynine Palms include Nitrate, Fluoride, Nitrate-Nitrite, Copper, Lithium. The full list, with the level at the main supplier and the data source, is in the table above.

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.