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Tap water quality report

Coppermill 520

EPA monitoring tested this supplier for 71 contaminants and detected 12. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

71
contaminants tested
12
detected
62
people served
0
health-based violations
Washington rankingsLead in WashingtonPFAS in Washington
Water source
Ground water
Ownership
Local government
Counties served
Thurston

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
1
violations on file
0
still open
ViolationTypeStatusPeriod
MR Monitoring Resolved 2020-01-01

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
Arsenic
2 µg/L 20%
of the EPA limit 10 µg/L
 3/3 SYR4 2016–2019
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
 3/3 LCR 2024
Barium
7 µg/L 0.4%
of the EPA limit 2000 µg/L
 2/3 SYR4 2016–2019
Bromodichloromethane
1 µg/L
No EPA limit set
 2/2 SYR4 2019
Chloroform
9.7 µg/L
No EPA limit set
 2/4 SYR4 2016–2019
Nitrate
32 µg/L 0.3%
of the EPA limit 10000 µg/L
 2/6 SYR4 2016–2019
TTHM
10.6 µg/L 13%
of the EPA limit 80 µg/L
 2/2 SYR4 2019
Copper
1 µg/L 0.1%
of the EPA limit 1300 µg/L
 1/3 SYR4 2016–2019
Chromium
1 µg/L 1%
of the EPA limit 100 µg/L
 1/3 SYR4 2016–2019
Nitrate-Nitrite
32 µg/L 0.3%
of the EPA limit 10000 µg/L
 1/3 SYR4 2016–2019
Selenium
2 µg/L 4%
of the EPA limit 50 µg/L
 1/3 SYR4 2016–2019
Toluene
3 µg/L 0.3%
of the EPA limit 1000 µg/L
 1/3 SYR4 2016–2019
59 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, TotalAsbestosAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalBromoformChlorobenzeneCyanideCadmiumCarbon TetrachlorideChlordaneDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDibromoacetic AcidDibromochloromethaneDichloroacetic AcidDinosebEndrinEthylbenzeneFluorideHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoLeadMercuryMethoxychlorMonobromoacetic AcidMonochloroacetic AcidNitritePentachlorophenolPicloramSimazineStyreneTetrachloroethyleneThallium, TotalTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroacetic AcidTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
Kimberly Gubbe

Frequently asked questions about Coppermill 520

Is Coppermill 520 tap water safe to drink?

EPA monitoring detected 12 contaminants in Coppermill 520'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 Coppermill 520's water?

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

How many people does Coppermill 520 serve?

Coppermill 520 reports serving 62 people in Washington, per its EPA record.

Has Coppermill 520 had any water quality violations?

The EPA has 1 violation on file for Coppermill 520, 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.