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Tap water quality report

Umpqua Basin Water Assoc

EPA monitoring tested this supplier for 103 contaminants and detected 10. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

103
contaminants tested
10
detected
9,499
people served
3
health-based violations
Oregon rankingsLead in OregonPFAS in Oregon
Water source
Surface water
Ownership
Private
Counties served
Douglas

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.

3
health-based violations
81
violations on file
0
still open
ViolationTypeStatusPeriod
TT Health-based Resolved 2024-04-01
TT Health-based Resolved 2024-04-01
TT Health-based Resolved 1995-11-01 → 1995-11-30
MR Monitoring Resolved 2025-08-01 → 2025-08-31
MR Monitoring Resolved 2025-07-01 → 2025-07-31
MR Monitoring Resolved 2025-06-01 → 2025-06-30
MR Monitoring Resolved 2025-05-01 → 2025-05-31
MR Monitoring Resolved 2024-07-01 → 2024-07-31
MR Monitoring Resolved 2024-07-01 → 2024-07-31
Other Monitoring Resolved 2024-05-30

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
TTHM
64.8 µg/L 81%
of the EPA limit 80 µg/L
 39/39 SYR4 2012–2019
Total Haloacetic Acids (HAA5)
96 µg/L 160%
of the EPA limit, in the worst sample — 60 µg/L
 39/39 SYR4 2012–2019
Copper
475 µg/L 37%
of the EPA limit 1300 µg/L
 35/40 SYR4 2014–2017
Lead
0.0350 mg/L 233%
above the EPA limit of 0.0150 mg/L
 26/26 LCR 2025
Lead
38 µg/L 253%
of the EPA limit, in the worst sample — 15 µg/L
 21/41 SYR4 2014–2019
Nitrate
120 µg/L 1.2%
of the EPA limit 10000 µg/L
 4/18 SYR4 2012–2019
Arsenic
1.1 µg/L 11%
of the EPA limit 10 µg/L
 1/1 SYR4 2019
Fluoride
119 µg/L 3%
of the EPA limit 4000 µg/L
 1/2 SYR4 2016–2019
Nitrate-Nitrite
40 µg/L 0.4%
of the EPA limit 10000 µg/L
 1/3 SYR4 2013–2019
Nitrite
40 µg/L 4%
of the EPA limit 1000 µg/L
 1/3 SYR4 2013–2019
93 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, TotalAsbestosAtrazineBhc-GammaBariumBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumCombined Radium (-226 And -228)Combined UraniumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateGross Alpha, Excl. Radon And UHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorNetfosaaNfdhaNmefosaaOxamylPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneLithiumO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
UMPQUA BASIN WATER ASSOC
Phone
541-672-5559
Email
bjohnson@ubwa.org

Frequently asked questions about Umpqua Basin Water Assoc

Is Umpqua Basin Water Assoc tap water safe to drink?

EPA monitoring detected 10 contaminants in Umpqua Basin Water Assoc'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 Umpqua Basin Water Assoc's water?

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

How many people does Umpqua Basin Water Assoc serve?

Umpqua Basin Water Assoc reports serving 9,499 people in Oregon, per its EPA record.

Has Umpqua Basin Water Assoc had any water quality violations?

The EPA has 81 violations on file for Umpqua Basin Water Assoc, of which 3 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.