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Tap water quality report

Seaside, OR

EPA monitoring detected 9 contaminants across the 3 water suppliers serving Seaside. 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.

3
water suppliers
7,742
people served
9
contaminants found
Oregon rankings Lead in Oregon PFAS in Oregon

What was found in Seaside'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
600 µg/L 6%
of the EPA limit 10000 µg/L
Main supplier: SEASIDE WATER DEPARTMENT · 7,482 people · 2019
Highest in the city: 1500 µg/L — ELDERBERRY NEHALEM WS · 160 people · 2018
3/3 SYR4
Nitrate-Nitrite
600 µg/L 6%
of the EPA limit 10000 µg/L
Main supplier: SEASIDE WATER DEPARTMENT · 7,482 people · 2013
2/3 SYR4
Copper
121 µg/L 9.3%
of the EPA limit 1300 µg/L
Main supplier: SEASIDE WATER DEPARTMENT · 7,482 people · 2019
Highest in the city: 429.6 µg/L — ELDERBERRY NEHALEM WS · 160 people · 2016
3/3 SYR4
TTHM
46.945 µg/L 59%
of the EPA limit 80 µg/L
Main supplier: SEASIDE WATER DEPARTMENT · 7,482 people · 2019
2/3 SYR4
Total Haloacetic Acids (HAA5)
21.365 µg/L 36%
of the EPA limit 60 µg/L
Main supplier: SEASIDE WATER DEPARTMENT · 7,482 people · 2019
2/3 SYR4
Lead
7.35 µg/L 49%
of the EPA limit 15 µg/L
Main supplier: SEASIDE WATER DEPARTMENT · 7,482 people · 2019
3/3 SYR4
Di(2-ethylhexyl) Phthalate
1.7 µg/L 28%
of the EPA limit 6 µg/L
Main supplier: SEASIDE WATER DEPARTMENT · 7,482 people · 2018
1/3 SYR4
P-Dichlorobenzene
0.5000 µg/L 0.7%
of the EPA limit 75 µg/L
Main supplier: SEASIDE WATER DEPARTMENT · 7,482 people · 2019
1/3 SYR4
Lead
0.00071 mg/L 4.7%
of the EPA limit 0.0150 mg/L
Main supplier: SEASIDE WATER DEPARTMENT · 7,482 people · 2025
3/3 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 Seaside

SupplierPopulation served
SEASIDE WATER DEPARTMENT 7,482
ELDERBERRY NEHALEM WS 160
MAPLE ELSIE WATER SERVICE 100

Frequently asked questions about Seaside tap water

Is Seaside tap water safe to drink?

EPA testing detected 9 contaminants in the water serving Seaside. 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 Seaside?

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

What contaminants are in Seaside's water?

The contaminants EPA monitoring detected in Seaside include Nitrate, Nitrate-Nitrite, Copper, TTHM, Total Haloacetic Acids (HAA5). 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.