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Tap water quality report

Underwood

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
1,000
people served
0
health-based violations
Washington rankingsLead in WashingtonPFAS in Washington
Water source
Ground water
Ownership
Local government
Counties served
Skamania

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
214
violations on file
0
still open
ViolationTypeStatusPeriod
MON Monitoring Resolved 2025-04-01 → 2025-04-30
MON Monitoring Resolved 2023-09-01 → 2023-09-30
MR Monitoring Resolved 2023-01-01 → 2025-12-31
MR Monitoring Resolved 2023-01-01 → 2025-12-31
MR Monitoring Resolved 2023-01-01 → 2025-12-31
MR Monitoring Resolved 2023-01-01 → 2025-12-31
MR Monitoring Resolved 2023-01-01 → 2025-12-31
MR Monitoring Resolved 2023-01-01 → 2025-12-31
MR Monitoring Resolved 2023-01-01 → 2025-12-31
MR Monitoring Resolved 2023-01-01 → 2025-12-31

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
Nitrate
1615 µg/L 16%
of the EPA limit 10000 µg/L
worst single sample: 1900 µg/L
40/48 SYR4 2012–2019
Lead
0.0085 mg/L 57%
of the EPA limit 0.0150 mg/L
 9/9 LCR 2023
Nitrate-Nitrite
550 µg/L 5.5%
of the EPA limit 10000 µg/L
 3/3 SYR4 2019
TTHM
1.2685 µg/L 1.6%
of the EPA limit 80 µg/L
worst single sample: 1.32 µg/L
2/2 SYR4 2014–2016
Bromodichloromethane
0.5300 µg/L
No EPA limit set
 1/7 SYR4 2013–2019
Chloroform
0.2900 µg/L
No EPA limit set
 1/10 SYR4 2013–2019
Dibromochloromethane
0.7900 µg/L
No EPA limit set
 1/7 SYR4 2013–2019
65 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-Dichloroethane1,2-Dichloropropane2,4,5-TP2,4-DAntimony, TotalArsenicAsbestosAtrazineBhc-GammaBariumBenzeneBenzo(A)PyreneBeryllium, TotalBromoformChlorobenzeneCopperCyanideCadmiumCarbon TetrachlorideChlordaneChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDibromoacetic AcidDichloroacetic AcidDinosebEndrinEthylbenzeneFluorideHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoLeadMercuryMethoxychlorMonobromoacetic AcidMonochloroacetic AcidNitritePentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Haloacetic Acids (HAA5)Total Polychlorinated Biphenyls (PCB)ToxapheneTrichloroacetic AcidTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
S John Shields

Frequently asked questions about Underwood

Is Underwood tap water safe to drink?

EPA monitoring detected 7 contaminants in Underwood'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 Underwood's water?

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

How many people does Underwood serve?

Underwood reports serving 1,000 people in Washington, per its EPA record.

Has Underwood had any water quality violations?

The EPA has 214 violations on file for Underwood, 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.