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Tap water quality report

Deer Island Waterworks

EPA monitoring tested this supplier for 72 contaminants and detected 7. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

72
contaminants tested
7
detected
90
people served
8
health-based violations
Oregon rankingsLead in OregonPFAS in Oregon
Water source
Ground water
Ownership
Private
Counties served
Columbia

Compliance record

Formal violations the EPA has on file for this supplier. A health-based violation means a contaminant limit or a required treatment was breached; the rest are monitoring or reporting failures — still violations, but not a measured health risk.

8
health-based violations
315
violations on file
12
still open
ViolationTypeStatusPeriod
TT Health-based Resolved 2024-10-17
TT Health-based Resolved 2024-10-17
TT Health-based Resolved 2024-07-01 → 2024-12-31
TT Health-based Resolved 2024-07-01 → 2024-12-31
TT Health-based Resolved 2024-01-01 → 2024-06-30
TT Health-based Resolved 2024-01-01 → 2024-06-30
TT Health-based Resolved 2024-01-01 → 2024-06-30
TT Health-based Resolved 2001-01-01
Other Monitoring Unaddressed 2026-02-20
MR Monitoring Unaddressed 2026-02-14

Other contaminants detected

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 this system's samples — over 100% is worth reading, but is not by itself a violation. Where a single sample came in higher than that percentile, it is noted under the bar. Formal violations are listed separately.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
Nitrate
5672 µg/L 57%
of the EPA limit 10000 µg/L
worst single sample: 6400 µg/L
28/28 SYR4 2012–2019
Lead
0.0055 mg/L 37%
of the EPA limit 0.0150 mg/L
 8/8 LCR 2024
Copper
205.2 µg/L 16%
of the EPA limit 1300 µg/L
worst single sample: 211 µg/L
2/15 SYR4 2013–2019
Barium
10.5 µg/L 0.5%
of the EPA limit 2000 µg/L
 1/1 SYR4 2019
Fluoride
130 µg/L 3.3%
of the EPA limit 4000 µg/L
 1/1 SYR4 2019
Nitrate-Nitrite
3250 µg/L 33%
of the EPA limit 10000 µg/L
 1/1 SYR4 2019
Nitrite
14.8 µg/L 1.5%
of the EPA limit 1000 µg/L
 1/1 SYR4 2019
65 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane2,4,5-TP2,4-DAntimony, TotalArsenicAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumCombined Radium (-226 And -228)Combined UraniumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateGross Alpha, Excl. Radon And UHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoLeadMercuryMethoxychlorOxamylPentachlorophenolPicloramSeleniumSimazineStyreneTTHMTetrachloroethyleneThallium, TotalTolueneTotal Haloacetic Acids (HAA5)Total Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
DEER ISLAND WATERWORKS
Phone
503-396-1193
Email
[email protected]

Frequently asked questions about Deer Island Waterworks

Is Deer Island Waterworks tap water safe to drink?

EPA monitoring detected 7 contaminants in Deer Island Waterworks's water. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and the utility's annual Consumer Confidence Report for its official compliance status.

What contaminants were detected in Deer Island Waterworks's water?

EPA monitoring detected Nitrate, Lead, Copper, Barium, Fluoride, and others. The full list with the level and data source for each is above.

How many people does Deer Island Waterworks serve?

Deer Island Waterworks reports serving 90 people in Oregon, per its EPA record.

Has Deer Island Waterworks had any water quality violations?

The EPA has 315 violations on file for Deer Island Waterworks, of which 8 are health-based (a contaminant limit or required treatment was breached) and 12 remain open. The rest are monitoring or reporting failures.

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.