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Tap water quality report

Warden, WA

EPA monitoring detected 21 contaminants across the 3 water suppliers serving Warden. A detection doesn't automatically mean the water is unsafe — see the highest level found for each below, with its EPA source and period.

3
water suppliers
4,746
people served
21
contaminants found
Washington rankings Lead in Washington PFAS in Washington

What was found in Warden's water

The highest level seen across the city's suppliers, the EPA limit for each, and where the figure comes from.

ContaminantLevel vs EPA limitSuppliersSource
Nitrate
15900 µg/L 159%
of the EPA limit, in the worst sample — 10000 µg/L
 3/3 SYR4
Nitrate-Nitrite
15900 µg/L 159%
of the EPA limit, in the worst sample — 10000 µg/L
 3/3 SYR4
Fluoride
911 µg/L 23%
of the EPA limit 4000 µg/L
 3/3 SYR4
TTHM
29.35 µg/L 37%
of the EPA limit 80 µg/L
 1/3 SYR4
Barium
26 µg/L 1.3%
of the EPA limit 2000 µg/L
 3/3 SYR4
Bromoform
14.8 µg/L
No EPA limit set
 1/3 SYR4
Arsenic
12.2 µg/L 122%
of the EPA limit, in the worst sample — 10 µg/L
 3/3 SYR4
Dibromochloromethane
10.8 µg/L
No EPA limit set
 1/3 SYR4
Copper
9.81 µg/L 0.8%
of the EPA limit 1300 µg/L
 3/3 SYR4
Lithium
9.3 µg/L
No EPA limit set
 1/3 UCMR-5
Selenium
4.9 µg/L 9.8%
of the EPA limit 50 µg/L
 1/3 SYR4
Dibromoacetic Acid
3.3 µg/L
No EPA limit set
 1/3 SYR4
Total Haloacetic Acids (HAA5)
3.3 µg/L 5.5%
of the EPA limit 60 µg/L
 1/3 SYR4
Bromodichloromethane
3.25 µg/L
No EPA limit set
 1/3 SYR4
Chromium
1.5 µg/L 1.5%
of the EPA limit 100 µg/L
 1/3 SYR4
Chloroform
0.7900 µg/L
No EPA limit set
 1/3 SYR4
Trichloroethylene
0.7100 µg/L 14%
of the EPA limit 5 µg/L
 1/3 SYR4
Lead
0.3000 µg/L 2%
of the EPA limit 15 µg/L
 1/3 SYR4
Thallium, Total
0.2800 µg/L 14%
of the EPA limit 2 µg/L
 1/3 SYR4
Ethylene Dibromide
0.1180 µg/L 236%
of the EPA limit, in the worst sample — 0.0500 µg/L
 1/3 SYR4
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
 3/3 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 single worst sample on record — 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 Warden

SupplierPopulation served
WARDEN CITY OF 4,674
SAGE HILLS ESTATES 1 38
SAGE HILLS SECOND WATER SYSTEM 34

Frequently asked questions about Warden tap water

Is Warden tap water safe to drink?

EPA testing detected 21 contaminants in the water serving Warden. 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 Warden?

3 public water suppliers report drinking-water monitoring for Warden, Washington to the EPA. Each is listed above with its population served.

What contaminants are in Warden's water?

The contaminants EPA monitoring detected in Warden include Nitrate, Nitrate-Nitrite, Fluoride, TTHM, Barium. The full list, with the highest level found 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.