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Tap water quality report

Pattison 500

EPA monitoring tested this supplier for 87 contaminants and detected 9. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

87
contaminants tested
9
detected
4,643
people served
11
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.

11
health-based violations
67
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Archived 1998-05-01 → 1998-05-31
MCL Health-based Archived 1998-05-01 → 1998-05-31
MCL Health-based Archived 1998-05-01 → 1998-05-31
MCL Health-based Archived 1998-04-01 → 1998-04-30
MCL Health-based Archived 1998-04-01 → 1998-04-30
MCL Health-based Archived 1998-04-01 → 1998-04-30
MCL Health-based Archived 1995-11-01 → 1995-11-30
MCL Health-based Archived 1991-10-01 → 1991-10-31
MCL Health-based Archived 1991-10-01 → 1991-10-31
MCL Health-based Archived 1991-10-01 → 1991-10-31

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 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
Nitrate
3500 µg/L 35%
of the EPA limit 10000 µg/L
 102/102 SYR4 2012–2019
Lead
0.0031 mg/L 21%
of the EPA limit 0.0150 mg/L
 14/14 LCR 2024
Nitrate-Nitrite
3400 µg/L 34%
of the EPA limit 10000 µg/L
 8/8 SYR4 2013–2016
Arsenic
1 µg/L 10%
of the EPA limit 10 µg/L
 4/8 SYR4 2013–2016
TTHM
1.91 µg/L 2.4%
of the EPA limit 80 µg/L
 4/4 SYR4 2012–2019
Dibromochloromethane
0.8600 µg/L
No EPA limit set
 3/19 SYR4 2012–2019
Bromodichloromethane
0.6000 µg/L
No EPA limit set
 2/19 SYR4 2012–2019
Chloroform
0.3000 µg/L
No EPA limit set
 2/20 SYR4 2012–2019
Bromoform
0.5400 µg/L
No EPA limit set
 1/19 SYR4 2012–2019
78 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, TotalBariumBenzeneBeryllium, TotalChlorobenzeneCopperCyanideCadmiumCarbon TetrachlorideChromiumDichloromethaneDalaponDibromoacetic AcidDichloroacetic AcidDinosebEthylene DibromideEthylbenzeneFluorideHfpo-DaLeadMercuryMonobromoacetic AcidMonochloroacetic AcidNetfosaaNfdhaNmefosaaNitritePfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumStyreneTetrachloroethyleneThallium, TotalTolueneTotal Haloacetic Acids (HAA5)Trichloroacetic AcidTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneLithiumO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
Kimberly Gubbe

Frequently asked questions about Pattison 500

Is Pattison 500 tap water safe to drink?

EPA monitoring detected 9 contaminants in Pattison 500'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 Pattison 500's water?

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

How many people does Pattison 500 serve?

Pattison 500 reports serving 4,643 people in Washington, per its EPA record.

Has Pattison 500 had any water quality violations?

The EPA has 67 violations on file for Pattison 500, of which 11 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.