SIERRA CITY WATER WORKS, INC.

GRASS VALLEY, CA · ~250 people served

Check your exact address → GRASS VALLEY overview

100

Excellent

PurityRadar safety score

PWSID

CA4600056

State

California

City

GRASS VALLEY

Population served

250

Primary source

Groundwater

Score history

No change since tracking began Jun 18, 2026.

Jun 18, 2026 · score 100 Jun 18, 2026 · score 100

2 score updates logged since tracking began Jun 18, 2026. Each future EPA re-score adds a point.

PFAS & contaminant readings

No PFAS detections are on record for this system from EPA’s UCMR5 monitoring (2023–25). Absence of a detection isn’t a guarantee — not every system was sampled, and this dataset doesn’t cover other contaminants.

Violations & enforcement

Violations on record

Unaddressed

Health-based

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Mar 2022. Official EPA record →

Monitoring · Lead & Copper Rule began Dec 2021 Resolved

Monitoring & reporting · Lead & Copper Rule began Jul 1993 Resolved

Monitoring & reporting · Total coliform began Dec 1992 Resolved

Recent enforcement actions

State action · SFL Mar 2022
State action · SOX Jan 2022
EPA/federal action · EOX Mar 2000
State action · SOX Jun 1997

This profile is built from EPA public records for system CA4600056 — SDWIS violations and UCMR5 PFAS sampling. The score is system-level and can’t account for your home’s plumbing (older pipes can add lead at the tap). For health decisions, check your exact address, read the utility’s Consumer Confidence Report, and confirm with your provider.