TapScore USA

Mattawa City of EPA Drinking Water Compliance Record

TapScore summarizes EPA Safe Drinking Water Information System records for public water system WA5352000. It does not test household tap water or determine whether water is currently safe to drink.

C

Some recent records

TapScore compliance-history grade

2 EPA violation records from July 1, 2021 through June 30, 2026

1 classified as health-based

System details

PWSID
WA5352000
Population served
5,370
Water source
Ground Water
Owner type
Local Government
State
Washington
EPA region
10
All historical records
173
Not marked resolved
40

How to read this grade

Grade C means “Some recent records” under TapScore's published method. It is a comparison of recent EPA compliance records, not an EPA grade, laboratory result, health recommendation, or guarantee of present water quality.

EPA contaminant categories in violation records

EPA categoryClassificationRecords
Coliform (TCR)Health-based record13
CadmiumMonitoring/reporting record5
FluorideMonitoring/reporting record5
NickelMonitoring/reporting record5
ThalliumMonitoring/reporting record5
BerylliumMonitoring/reporting record5
ChromiumMonitoring/reporting record5
SeleniumMonitoring/reporting record5
Beryllium, TotalMonitoring/reporting record5
Thallium, TotalMonitoring/reporting record5
BariumMonitoring/reporting record5
CyanideMonitoring/reporting record5
ArsenicMonitoring/reporting record5
PentachlorophenolMonitoring/reporting record4
NitrateMonitoring/reporting record3
Vinyl ChlorideMonitoring/reporting record2
Trichloroethylene (TCE)Monitoring/reporting record2
Vinyl chlorideMonitoring/reporting record2
trans-1,2-DichloroethyleneMonitoring/reporting record2
1,2-DichloroethaneMonitoring/reporting record2

Showing the 20 categories with the most records out of 66 categories in this system's history.

These are compliance records associated with an EPA contaminant code, not current tap-water test results or proof that a substance is presently detected.

Violation history by year

2024
1
2023
1
2013
34
2011
1
2010
2
2009
1
2007
45
2006
1
2004
32
2001
40

Historical counts may include resolved records. For current notices and local sampling results, check the utility's latest Consumer Confidence Report and your state drinking-water agency.

Reported service area

Cities served

Mattawa

ZIP codes served

99349

County: Grant