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Tap water quality report

Bellevue, WA

EPA monitoring detected 8 contaminants across the 1 water supplier serving Bellevue. A detection doesn't automatically mean the water is unsafe — see the highest level found for each below, with its EPA source and period.

1
water supplier
321,349
people served
8
contaminants found
Washington rankings Lead in Washington PFAS in Washington

What was found in Bellevue'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
Total Haloacetic Acids (HAA5)
57.02 µg/L 95%
of the EPA limit 60 µg/L
 1/1 SYR4
TTHM
54.85 µg/L 69%
of the EPA limit 80 µg/L
 1/1 SYR4
Chloroform
48.2 µg/L
No EPA limit set
 1/1 SYR4
Trichloroacetic Acid
30.3 µg/L
No EPA limit set
 1/1 SYR4
Dichloroacetic Acid
24.3 µg/L
No EPA limit set
 1/1 SYR4
Bromodichloromethane
6.12 µg/L
No EPA limit set
 1/1 SYR4
Monochloroacetic Acid
4.9 µg/L
No EPA limit set
 1/1 SYR4
Dibromochloromethane
1.07 µg/L
No EPA limit set
 1/1 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 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 Bellevue

SupplierPopulation served
BELLEVUE CITY OF 321,349

Frequently asked questions about Bellevue tap water

Is Bellevue tap water safe to drink?

EPA testing detected 8 contaminants in the water serving Bellevue. 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 Bellevue?

1 public water supplier report drinking-water monitoring for Bellevue, Washington to the EPA. Each is listed above with its population served.

What contaminants are in Bellevue's water?

The contaminants EPA monitoring detected in Bellevue include Total Haloacetic Acids (HAA5), TTHM, Chloroform, Trichloroacetic Acid, Dichloroacetic Acid. 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.