Home/ Directory/ CA/ SISKIYOU CO. ROLLING HILLS MWC

Water system · PWSID CA4700528

SISKIYOU CO. ROLLING HILLS MWC

YREKA, CA · ~300 people served

Check your exact address → YREKA overview
100
Excellent
PurityRadar safety score

PWSID

CA4700528

State

California

City

YREKA

Population served

300

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

6

Violations on record

0

Unaddressed

3

Health-based

11

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Dec 2015. Official EPA record →

Monitoring & reporting · Total coliform began Nov 2015 Resolved
Max contaminant level (MCL) · Total coliform health-based began Jun 2014 Resolved
Max contaminant level (MCL) · Total coliform health-based began Dec 2010 Resolved
Max contaminant level (MCL) · Total coliform health-based began Jan 2005 Resolved
Monitoring & reporting · Total coliform began Dec 1993 Resolved
Monitoring & reporting · Lead & Copper Rule began Jul 1993 Resolved

Recent enforcement actions

  • State action · SOX Dec 2015
  • State action · SIE Dec 2015
  • State action · SOX Jul 2014
  • State action · SIE Jun 2014
  • State action · SOX Jan 2011
  • State action · SIE Dec 2010
  • State action · SOX Feb 2005
  • State action · SIE Feb 2005

Area water-quality monitoring

Environmental monitoring (rivers, wells, intakes) recorded in this system’s service area in the EPA/USGS Water Quality Portal since 2018 — source/ambient water, not finished tap water. Context for the watershed, not a reading from your tap.

ContaminantMedian · max · samples

Nitrate

1 station · latest Oct 2020

1.77 · max 1.77 mg/l as N · 2

Atrazine

1 station · latest Oct 2020

0.009 · max 0.009 ug/l · 1

Copper

1 station · latest Oct 2020

1.2 · max 1.2 ug/l · 1

Fluoride

1 station · latest Oct 2020

0.12 · max 0.12 mg/l · 1

Lead

1 station · latest Oct 2020

0.163 · max 0.163 ug/l · 1

Uranium

1 station · latest Oct 2020

1.21 · max 1.21 ug/l · 1

Source: Water Quality Portal (EPA/USGS/state agencies). Values are as-reported and aren’t health thresholds.

This profile is built from EPA public records for system CA4700528 — 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.