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Tap water quality report

Newcastle, WA

EPA monitoring detected 7 contaminants across the 1 water supplier serving Newcastle. 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.

1
water supplier
15,989
people served
7
contaminants found
Washington rankings Lead in Washington PFAS in Washington

What was found in Newcastle'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
Total Haloacetic Acids (HAA5)
65.13499999999999 µg/L 109%
of the EPA limit, at the 95th percentile of samples — 60 µg/L
Main supplier: COAL CREEK UTILITY DISTRICT · 15,989 people · 2019
1/1 SYR4
TTHM
45.49799999999999 µg/L 57%
of the EPA limit 80 µg/L
Main supplier: COAL CREEK UTILITY DISTRICT · 15,989 people · 2019
1/1 SYR4
Chloroform
43.68999999999999 µg/L
No EPA limit set
Main supplier: COAL CREEK UTILITY DISTRICT · 15,989 people · 2019
1/1 SYR4
Trichloroacetic Acid
35.38499999999996 µg/L
No EPA limit set
Main supplier: COAL CREEK UTILITY DISTRICT · 15,989 people · 2019
1/1 SYR4
Dichloroacetic Acid
26.059999999999995 µg/L
No EPA limit set
Main supplier: COAL CREEK UTILITY DISTRICT · 15,989 people · 2019
1/1 SYR4
Monochloroacetic Acid
3.988 µg/L
No EPA limit set
Main supplier: COAL CREEK UTILITY DISTRICT · 15,989 people · 2019
1/1 SYR4
Bromodichloromethane
2.37 µg/L
No EPA limit set
Main supplier: COAL CREEK UTILITY DISTRICT · 15,989 people · 2019
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 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 Newcastle

SupplierPopulation served
COAL CREEK UTILITY DISTRICT 15,989

Frequently asked questions about Newcastle tap water

Is Newcastle tap water safe to drink?

EPA testing detected 7 contaminants in the water serving Newcastle. 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 Newcastle?

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

What contaminants are in Newcastle's water?

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