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Tap water quality report

Tualatin, City of

EPA monitoring tested this supplier for 106 contaminants and detected 10. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

106
contaminants tested
10
detected
28,106
people served
0
health-based violations
Oregon rankingsLead in OregonPFAS in Oregon
Water source
SWP
Ownership
Local government
Counties served
Washington

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.

0
health-based violations
8
violations on file
0
still open
ViolationTypeStatusPeriod
MON Monitoring Resolved 2024-06-01 → 2024-06-30
MR Monitoring Resolved 2019-10-01 → 2019-12-31
MR Monitoring Resolved 2019-10-01 → 2019-12-31
MON Monitoring Resolved 2019-01-01 → 2019-01-31
MR Monitoring Resolved 2017-01-01 → 2017-03-31
MR Monitoring Resolved 2017-01-01 → 2017-03-31
MR Monitoring Resolved 2007-08-01 → 2007-08-31
MR Monitoring Resolved 2007-08-01 → 2007-08-31

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
Copper
414.45 µg/L 32%
of the EPA limit 1300 µg/L
worst single sample: 941 µg/L
1292/1499 SYR4 2012–2019
Lead
24.09 µg/L 161%
of the EPA limit, at the 95th percentile of samples — 15 µg/L
worst single sample: 648 µg/L
1272/1500 SYR4 2012–2019
TTHM
42.1 µg/L 53%
of the EPA limit 80 µg/L
worst single sample: 70.9 µg/L
118/122 SYR4 2012–2019
Total Haloacetic Acids (HAA5)
39.665 µg/L 66%
of the EPA limit 60 µg/L
worst single sample: 49.4 µg/L
118/122 SYR4 2012–2019
Lead
0.0049 mg/L 33%
of the EPA limit 0.0150 mg/L
 58/58 LCR 2025
Barium
24.02 µg/L 1.2%
of the EPA limit 2000 µg/L
worst single sample: 32 µg/L
7/9 SYR4 2012–2019
Fluoride
187 µg/L 4.7%
of the EPA limit 4000 µg/L
worst single sample: 190 µg/L
3/9 SYR4 2012–2019
Nitrate
109 µg/L 1.1%
of the EPA limit 10000 µg/L
 2/36 SYR4 2012–2019
Bromate
0.7000 µg/L 7%
of the EPA limit 10 µg/L
 1/10 SYR4 2015–2019
Combined Uranium
0.0830 µg/L 0.3%
of the EPA limit 30 µg/L
 1/3 SYR4 2012–2014
96 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS2,4,5-TP2,4-D4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalArsenicAsbestosAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneChloriteChromiumCombined Radium (-226 And -228)DichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateGross Alpha, Excl. Radon And UGross Beta Particle ActivityHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorNetfosaaNfdhaNmefosaaNitrate-NitriteNitriteOxamylPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneLithiumO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
TUALATIN, CITY OF
Phone
503-691-3095
Email
[email protected]

Frequently asked questions about Tualatin, City of

Is Tualatin, City of tap water safe to drink?

EPA monitoring detected 10 contaminants in Tualatin, City of'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 Tualatin, City of's water?

EPA monitoring detected Copper, Lead, TTHM, Total Haloacetic Acids (HAA5), Lead, and others. The full list with the level and data source for each is above.

How many people does Tualatin, City of serve?

Tualatin, City of reports serving 28,106 people in Oregon, per its EPA record.

Has Tualatin, City of had any water quality violations?

The EPA has 8 violations on file for Tualatin, City of, of which 0 are health-based (a contaminant limit or required treatment was breached) and 0 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.