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Tap water quality report

Bainbridge Island, WA

EPA monitoring detected 12 contaminants across the 2 water suppliers serving Bainbridge Island. 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
13,666
people served
12
contaminants found
Washington rankings Lead in Washington PFAS in Washington

What was found in Bainbridge Island'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
Fluoride
1200 µg/L 30%
of the EPA limit 4000 µg/L
Main supplier: BAINBRIDGE ISLAND CITY OF · 13,491 people · 2015
1/2 SYR4
Nitrate
230 µg/L 2.3%
of the EPA limit 10000 µg/L
Highest in the city: ROCKAWAY BEACH WATER · 175 people · 2019
1/2 SYR4
Nitrate-Nitrite
119.5 µg/L 1.2%
of the EPA limit 10000 µg/L
Main supplier: BAINBRIDGE ISLAND CITY OF · 13,491 people · 2015
Highest in the city: 140 µg/L — ROCKAWAY BEACH WATER · 175 people · 2015
2/2 SYR4
TTHM
45.575 µg/L 57%
of the EPA limit 80 µg/L
Main supplier: BAINBRIDGE ISLAND CITY OF · 13,491 people · 2019
2/2 SYR4
Chloroform
35 µg/L
No EPA limit set
Main supplier: BAINBRIDGE ISLAND CITY OF · 13,491 people · 2019
2/2 SYR4
Total Haloacetic Acids (HAA5)
16.455 µg/L 27%
of the EPA limit 60 µg/L
Main supplier: BAINBRIDGE ISLAND CITY OF · 13,491 people · 2019
1/2 SYR4
Trichloroacetic Acid
11.165 µg/L
No EPA limit set
Main supplier: BAINBRIDGE ISLAND CITY OF · 13,491 people · 2019
1/2 SYR4
Bromodichloromethane
8.25 µg/L
No EPA limit set
Main supplier: BAINBRIDGE ISLAND CITY OF · 13,491 people · 2019
2/2 SYR4
Dichloroacetic Acid
5.575 µg/L
No EPA limit set
Main supplier: BAINBRIDGE ISLAND CITY OF · 13,491 people · 2019
1/2 SYR4
Arsenic
5.25 µg/L 53%
of the EPA limit 10 µg/L
Main supplier: BAINBRIDGE ISLAND CITY OF · 13,491 people · 2015
2/2 SYR4
Dibromochloromethane
2.7 µg/L
No EPA limit set
Main supplier: BAINBRIDGE ISLAND CITY OF · 13,491 people · 2019
2/2 SYR4
Lead
0.0030 mg/L 20%
of the EPA limit 0.0150 mg/L
Main supplier: BAINBRIDGE ISLAND CITY OF · 13,491 people · 2025
Highest in the city: 0.0033 mg/L — ROCKAWAY BEACH WATER · 175 people · 2023
2/2 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 Bainbridge Island

SupplierPopulation served
BAINBRIDGE ISLAND CITY OF 13,491
ROCKAWAY BEACH WATER 175

Frequently asked questions about Bainbridge Island tap water

Is Bainbridge Island tap water safe to drink?

EPA testing detected 12 contaminants in the water serving Bainbridge Island. 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 Bainbridge Island?

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

What contaminants are in Bainbridge Island's water?

The contaminants EPA monitoring detected in Bainbridge Island include Fluoride, Nitrate, Nitrate-Nitrite, TTHM, Chloroform. 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.