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Water system · PWSID CA4510005

CITY OF REDDING

REDDING, CA · ~89,628 people served

Check your exact address → REDDING overview
33
Action needed
PurityRadar safety score

PWSID

CA4510005

State

California

City

REDDING

Population served

89,628

Primary source

Surface water

Score history

▼ 67 points — the score moved from 100 to 33 on Jun 18, 2026, as newly published EPA data was incorporated.

Jun 18, 2026 · score 100 Jun 18, 2026 · score 33

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

PFAS & contaminant readings

Latest detections from EPA’s UCMR5 monitoring (through Sep 2023). Levels in parts per trillion (ppt).

PFOA

Perfluorooctanoic acid

12 ppt

limit 4 ppt

Above EPA limit · 3.0×

PFOS

Perfluorooctanesulfonic acid

9.5 ppt

limit 4 ppt

Above EPA limit · 2.4×

PFHxS

Perfluorohexanesulfonic acid

5.6 ppt

limit 10 ppt

Near EPA limit

Lithium

27,800 ppt

limit —

No federal limit

PFBS

8.9 ppt

limit —

No federal limit

PFHxA

5.7 ppt

limit —

No federal limit

PFPeA

5.4 ppt

limit —

No federal limit

PFHpA

4.1 ppt

limit —

No federal limit

Violations & enforcement

5

Violations on record

0

Unaddressed

5

Health-based

9

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Oct 2012. Official EPA record →

Max contaminant level (MCL) · Arsenic health-based began Jan 2009 Resolved
Max contaminant level (MCL) · Arsenic health-based began Oct 2008 Resolved
Max contaminant level (MCL) · Arsenic health-based began Jul 2008 Resolved
Max contaminant level (MCL) · Arsenic health-based began Apr 2008 Resolved
Treatment technique · EPA contaminant 0200 health-based began Aug 1994 Resolved

Recent enforcement actions

  • State action · SOX Oct 2012
  • State action · SFL Apr 2009
  • State action · SIA Dec 2008
  • State action · SIA Dec 2008
  • State action · SIA Mar 2007
  • EPA/federal action · EOX Mar 2000
  • State action · SOX Jul 1995
  • State action · SIA Nov 1994

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 Dec 2022

1.39 · max 1.39 mg/l as N · 2

Arsenic

1 station · latest Dec 2022

0.53 · max 0.53 ug/l · 1

Fluoride

1 station · latest Dec 2022

0.04 · max 0.04 mg/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 CA4510005 — 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.