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Tap water quality report

Trentwood Irrigation District 3

EPA monitoring tested this supplier for 94 contaminants and detected 13. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

94
contaminants tested
13
detected
4,228
people served
3
health-based violations
Washington rankingsLead in WashingtonPFAS in Washington
Water source
Ground water
Ownership
Local government
Counties served
Spokane

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
44
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Archived 1992-05-01 → 1992-05-31
MCL Health-based Archived 1992-05-01 → 1992-05-31
MCL Health-based Archived 1992-05-01 → 1992-05-31
MR Monitoring Resolved 2025-07-01 → 2025-09-30
Other Monitoring Resolved 2024-07-01
MON Monitoring Resolved 2023-07-01 → 2023-07-31
Other Monitoring Resolved 2016-07-01
Other Monitoring Resolved 2015-07-01
MR Monitoring Resolved 2015-01-01 → 2015-03-31
Other Monitoring Resolved 2013-07-01

PFAS detected

PFAS are industrial “forever chemicals”. These are the EPA's latest nationwide test results (2023–2025).
ContaminantMaxDetection ratePeriod
PFBS 0.0049 µg/L 2/8 2024
PFOS 0.0120 µg/L 2/8 2024
Pfhxa 0.0040 µg/L 1/8 2024
PFOA 0.0051 µg/L 1/8 2024
Pfpea 0.0039 µg/L 1/8 2024

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
6260 µg/L 63%
of the EPA limit 10000 µg/L
worst single sample: 6720 µg/L
66/66 SYR4 2012–2019
Lead
0.0025 mg/L 17%
of the EPA limit 0.0150 mg/L
 12/12 LCR 2023
Arsenic
5.035 µg/L 50%
of the EPA limit 10 µg/L
worst single sample: 5.2 µg/L
4/4 SYR4 2012–2014
Barium
73.02 µg/L 3.7%
of the EPA limit 2000 µg/L
worst single sample: 75.6 µg/L
4/4 SYR4 2012–2014
Nitrate-Nitrite
5361.5 µg/L 54%
of the EPA limit 10000 µg/L
worst single sample: 5780 µg/L
4/4 SYR4 2012–2014
Copper
18.615 µg/L 1.4%
of the EPA limit 1300 µg/L
worst single sample: 19.5 µg/L
2/4 SYR4 2012–2014
Chromium
3.6 µg/L 3.6%
of the EPA limit 100 µg/L
 1/4 SYR4 2012–2014
Lead
4.39 µg/L 29%
of the EPA limit 15 µg/L
 1/4 SYR4 2012–2014
81 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS2,4,5-TP2,4-D4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalBromodichloromethaneBromoformChlorobenzeneCyanideCadmiumCarbon TetrachlorideChlordaneChloroformDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDibromochloromethaneDinosebEndrinEthylbenzeneFluorideHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorNetfosaaNfdhaNmefosaaNitritePfbaPfdaPfdoaPfeesaPfhpaPfhpsPFHXSPfmbaPfmpaPFNAPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneLithiumO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
Devon Sinsley

Frequently asked questions about Trentwood Irrigation District 3

Is Trentwood Irrigation District 3 tap water safe to drink?

EPA monitoring detected 13 contaminants in Trentwood Irrigation District 3'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 Trentwood Irrigation District 3's water?

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

How many people does Trentwood Irrigation District 3 serve?

Trentwood Irrigation District 3 reports serving 4,228 people in Washington, per its EPA record.

Has Trentwood Irrigation District 3 had any water quality violations?

The EPA has 44 violations on file for Trentwood Irrigation District 3, 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.