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Tap water quality report

Clackamas, OR

EPA monitoring detected 12 contaminants across the 5 water suppliers serving Clackamas. 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.

5
water suppliers
50,656
people served
12
contaminants found
Oregon rankings Lead in Oregon PFAS in Oregon

What was found in Clackamas'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
Nitrate
700 µg/L 7%
of the EPA limit 10000 µg/L
Main supplier: CLACKAMAS RIVER WATER · 29,918 people · 2019
3/5 SYR4
Nitrate-Nitrite
632.2 µg/L 6.3%
of the EPA limit 10000 µg/L
Main supplier: CLACKAMAS RIVER WATER · 29,918 people · 2019
1/5 SYR4
Copper
87 µg/L 6.7%
of the EPA limit 1300 µg/L
Main supplier: CLACKAMAS RIVER WATER · 29,918 people · 2018
Highest in the city: 155.3 µg/L — CLACKAMAS RIVER WATER - CLAIRMONT · 19,928 people · 2019
4/5 SYR4
Fluoride
140 µg/L 3.5%
of the EPA limit 4000 µg/L
Highest in the city: RIVERBEND MOBILE HOME PARK · 600 people · 2019
1/5 SYR4
TTHM
46.82 µg/L 59%
of the EPA limit 80 µg/L
Main supplier: CLACKAMAS RIVER WATER · 29,918 people · 2019
Highest in the city: 62.25 µg/L — CLACKAMAS RIVER WATER - CLAIRMONT · 19,928 people · 2019
3/5 SYR4
Nitrite
56.31 µg/L 5.6%
of the EPA limit 1000 µg/L
Main supplier: CLACKAMAS RIVER WATER · 29,918 people · 2019
1/5 SYR4
Lead
11 µg/L 73%
of the EPA limit 15 µg/L
Main supplier: CLACKAMAS RIVER WATER · 29,918 people · 2018
Highest in the city: 55.3 µg/L — CLACKAMAS RIVER WATER - CLAIRMONT · 19,928 people · 2019
4/5 SYR4
Total Haloacetic Acids (HAA5)
37.415 µg/L 62%
of the EPA limit 60 µg/L
Main supplier: CLACKAMAS RIVER WATER · 29,918 people · 2019
Highest in the city: 51.16 µg/L — CLACKAMAS RIVER WATER - CLAIRMONT · 19,928 people · 2019
3/5 SYR4
Barium
4.3115 µg/L 0.2%
of the EPA limit 2000 µg/L
Main supplier: CLACKAMAS RIVER WATER · 29,918 people · 2019
Highest in the city: 36.3 µg/L — RIVERBEND MOBILE HOME PARK · 600 people · 2019
3/5 SYR4
Arsenic
8 µg/L 80%
of the EPA limit 10 µg/L
Highest in the city: RIVERBEND MOBILE HOME PARK · 600 people · 2019
1/5 SYR4
Gross Alpha, Excl. Radon And U
4.5 pCi/L 30%
of the EPA limit 15 pCi/L
Main supplier: CLACKAMAS RIVER WATER · 29,918 people · 2017
1/5 SYR4
Lead
0.0017 mg/L 12%
of the EPA limit 0.0150 mg/L
Main supplier: CLACKAMAS RIVER WATER · 29,918 people · 2025
Highest in the city: 0.0020 mg/L — CLACKAMAS RIVER WATER - CLAIRMONT · 19,928 people · 2025
5/5 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 Clackamas

SupplierPopulation served
CLACKAMAS RIVER WATER 29,918
CLACKAMAS RIVER WATER - CLAIRMONT 19,928
RIVERBEND MOBILE HOME PARK 600
ESTACADA MOBILE VILLAGE 150
HIGHLAND VIEW MOBILE HOME PARK 60

Frequently asked questions about Clackamas tap water

Is Clackamas tap water safe to drink?

EPA testing detected 12 contaminants in the water serving Clackamas. 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 Clackamas?

5 public water suppliers report drinking-water monitoring for Clackamas, Oregon to the EPA. Each is listed above with its population served.

What contaminants are in Clackamas's water?

The contaminants EPA monitoring detected in Clackamas include Nitrate, Nitrate-Nitrite, Copper, Fluoride, TTHM. 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.