Tap WaterIndex

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Tap water quality report

Gresham, City of

EPA monitoring tested this supplier for 35 contaminants and detected 5. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

35
contaminants tested
5
detected
73,932
people served
0
health-based violations
Oregon rankingsLead in OregonPFAS in Oregon
Water source
SWP
Ownership
Local government
Counties served
Multnomah

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
21
violations on file
0
still open
ViolationTypeStatusPeriod
MR Monitoring Resolved 2022-07-01 → 2022-09-30
MR Monitoring Resolved 2022-07-01 → 2022-09-30
MR Monitoring Resolved 2007-07-01 → 2007-09-30
MR Monitoring Resolved 2007-07-01 → 2007-09-30
MR Monitoring Resolved 2006-02-01 → 2006-02-28
MR Monitoring Resolved 2002-09-01 → 2002-09-30
MR Monitoring Resolved 2000-06-01 → 2000-06-30
MR Monitoring Resolved 2000-03-01 → 2000-03-31
MR Monitoring Resolved 2000-02-01 → 2000-02-29
MR Monitoring Resolved 1995-11-01 → 1995-11-30

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 single worst sample on record — over 100% is worth reading, but is not by itself a violation. Formal violations are listed separately.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
Copper
941 µg/L 72%
of the EPA limit 1300 µg/L
 1413/1559 SYR4 2012–2019
Lead
648 µg/L 4320%
of the EPA limit, in the worst sample — 15 µg/L
 1317/1559 SYR4 2012–2019
TTHM
51.5 µg/L 64%
of the EPA limit 80 µg/L
 204/204 SYR4 2012–2019
Total Haloacetic Acids (HAA5)
66.6 µg/L 111%
of the EPA limit, in the worst sample — 60 µg/L
 203/204 SYR4 2012–2019
Lead
0.0034 mg/L 23%
of the EPA limit 0.0150 mg/L
 62/62 LCR 2025
30 contaminants tested, none detected
11Cl-PF3OUdS4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaHfpo-DaNetfosaaNfdhaNmefosaaPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaLithium

Utility contact

Contact
GRESHAM, CITY OF
Phone
503-618-2900
Email
steven.walker@greshamoregon.gov

Frequently asked questions about Gresham, City of

Is Gresham, City of tap water safe to drink?

EPA monitoring detected 5 contaminants in Gresham, 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 Gresham, City of's water?

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

How many people does Gresham, City of serve?

Gresham, City of reports serving 73,932 people in Oregon, per its EPA record.

Has Gresham, City of had any water quality violations?

The EPA has 21 violations on file for Gresham, 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.