TapScore USA

GRASS VALLEY WATER SYSTEM EPA Drinking Water Compliance Record

TapScore summarizes EPA Safe Drinking Water Information System records for public water system OR4100356. It does not test household tap water or determine whether water is currently safe to drink.

B

Few non-health records

TapScore compliance-history grade

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

System details

PWSID
OR4100356
Population served
184
Water source
Ground Water
Owner type
Local Government
State
Oregon
EPA region
10
All historical records
80
Not marked resolved
3

How to read this grade

Grade B means “Few non-health 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 record19
Consumer Confidence RuleMonitoring/reporting record3
Lead and Copper RuleMonitoring/reporting record2
NitrateMonitoring/reporting record2
CHLOROBENZENEMonitoring/reporting record1
o-DichlorobenzeneMonitoring/reporting record1
TolueneMonitoring/reporting record1
ChloramineMonitoring/reporting record1
2,4-DMonitoring/reporting record1
2,4,5-TPMonitoring/reporting record1
Di(2-ethylhexyl) adipateMonitoring/reporting record1
BenzeneMonitoring/reporting record1
AtrazineMonitoring/reporting record1
BHC-GAMMAMonitoring/reporting record1
ChlordaneMonitoring/reporting record1
1,2-DIBROMO-3-CHLOROPROPANEMonitoring/reporting record1
DinosebMonitoring/reporting record1
EndothallMonitoring/reporting record1
EndrinMonitoring/reporting record1
GlyphosateMonitoring/reporting record1

Showing the 20 categories with the most records out of 57 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

2026
1
2022
1
2011
1
2009
1
2008
1
2007
1
2005
1
2004
4
2003
2
2001
1

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

GRASS VALLEY

ZIP codes served

97029

County: Sherman