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Tap water quality report

Greenbank, WA

EPA monitoring detected 14 contaminants across the 2 water suppliers serving Greenbank. A detection doesn't automatically mean the water is unsafe — see the highest level found for each below, with its EPA source and period.

2
water suppliers
605
people served
14
contaminants found
Washington rankings Lead in Washington PFAS in Washington

What was found in Greenbank'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
4700 µg/L 47%
of the EPA limit 10000 µg/L
 2/2 SYR4
Nitrate-Nitrite
3400 µg/L 34%
of the EPA limit 10000 µg/L
 1/2 SYR4
Copper
190 µg/L 15%
of the EPA limit 1300 µg/L
 1/2 SYR4
Gross Beta Particle Activity
92 pCi/L
No EPA limit set
 1/2 SYR4
Lead
74 µg/L 493%
of the EPA limit, in the worst sample — 15 µg/L
 1/2 SYR4
Barium
29 µg/L 1.5%
of the EPA limit 2000 µg/L
 1/2 SYR4
Chromium
9 µg/L 9%
of the EPA limit 100 µg/L
 2/2 SYR4
Arsenic
5.5 µg/L 55%
of the EPA limit 10 µg/L
 2/2 SYR4
Total Haloacetic Acids (HAA5)
2.2 µg/L 3.7%
of the EPA limit 60 µg/L
 1/2 SYR4
Trichloroacetic Acid
2.2 µg/L
No EPA limit set
 1/2 SYR4
Dibromoacetic Acid
1.5 µg/L
No EPA limit set
 1/2 SYR4
Chloroform
0.7000 µg/L
No EPA limit set
 1/2 SYR4
TTHM
0.7000 µg/L 0.9%
of the EPA limit 80 µg/L
 1/2 SYR4
Lead
0.0013 mg/L 8.7%
of the EPA limit 0.0150 mg/L
 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 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 Greenbank

SupplierPopulation served
LAGOON POINT WATER DISTRICT 495
TWIN VIEW ESTATES COMMUNITY ASSOC 110

Frequently asked questions about Greenbank tap water

Is Greenbank tap water safe to drink?

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

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

What contaminants are in Greenbank's water?

The contaminants EPA monitoring detected in Greenbank include Nitrate, Nitrate-Nitrite, Copper, Gross Beta Particle Activity, Lead. 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.