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Tap water quality report

Indio, CA

EPA monitoring detected 14 contaminants across the 7 water suppliers serving Indio. 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.

7
water suppliers
85,625
people served
14
contaminants found
California rankings Lead in California PFAS in California

What was found in Indio'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-Nitrite
813000 µg/L 8130%
of the EPA limit, at the 95th percentile of samples — 10000 µg/L
Main supplier: INDIO WATER AUTHORITY · 84,757 people · 2019
1/7 SYR4
Nitrate
6780 µg/L 68%
of the EPA limit 10000 µg/L
Main supplier: INDIO WATER AUTHORITY · 84,757 people · 2019
3/7 SYR4
Fluoride
837.5 µg/L 21%
of the EPA limit 4000 µg/L
Main supplier: INDIO WATER AUTHORITY · 84,757 people · 2019
Highest in the city: 890 µg/L — CARVER TRACT MUTUAL WATER COMP · 600 people · 2017
4/7 SYR4
Barium
71.7 µg/L 3.6%
of the EPA limit 2000 µg/L
Highest in the city: CARVER TRACT MUTUAL WATER COMP · 600 people · 2017
3/7 SYR4
Chromium
18 µg/L 18%
of the EPA limit 100 µg/L
Main supplier: INDIO WATER AUTHORITY · 84,757 people · 2019
3/7 SYR4
Combined Uranium
7.7182 µg/L 26%
of the EPA limit 30 µg/L
Main supplier: INDIO WATER AUTHORITY · 84,757 people · 2019
2/7 SYR4
TTHM
6.42 µg/L 8%
of the EPA limit 80 µg/L
Main supplier: INDIO WATER AUTHORITY · 84,757 people · 2019
1/7 SYR4
Arsenic
5.68 µg/L 57%
of the EPA limit 10 µg/L
Highest in the city: THERMAL PARK · 73 people · 2018
2/7 SYR4
Bromoform
4.12 µg/L
No EPA limit set
Main supplier: INDIO WATER AUTHORITY · 84,757 people · 2019
1/7 SYR4
Dibromochloromethane
3.6 µg/L
No EPA limit set
Main supplier: INDIO WATER AUTHORITY · 84,757 people · 2019
1/7 SYR4
Bromodichloromethane
2.72 µg/L
No EPA limit set
Main supplier: INDIO WATER AUTHORITY · 84,757 people · 2019
1/7 SYR4
Chloroform
2.045 µg/L
No EPA limit set
Main supplier: INDIO WATER AUTHORITY · 84,757 people · 2019
1/7 SYR4
Dibromoacetic Acid
1.485 µg/L
No EPA limit set
Main supplier: INDIO WATER AUTHORITY · 84,757 people · 2019
1/7 SYR4
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
Main supplier: INDIO WATER AUTHORITY · 84,757 people · 2025
Highest in the city: 0.0050 mg/L — Aguirre MHP · 60 people · 2024
7/7 LCR
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 Indio

SupplierPopulation served
INDIO WATER AUTHORITY 84,757
CARVER TRACT MUTUAL WATER COMP 600
THERMAL PARK 73
Aguirre MHP 60
Angelique Maelee Properties 50
GALINDO HOUSING FACILITY 50
Vargas MHP 35

Frequently asked questions about Indio tap water

Is Indio tap water safe to drink?

EPA testing detected 14 contaminants in the water serving Indio. 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 Indio?

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

What contaminants are in Indio's water?

The contaminants EPA monitoring detected in Indio include Nitrate-Nitrite, Nitrate, Fluoride, Barium, Chromium. 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.