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Updated 2026-10-15
County water report

Shasta County Water Quality: 3 Cities Ranked by the Records

Shasta County, California: 3 city reports built from EPA and utility records. A county has many suppliers; each city shows the system that serves it.

Find my systemOpen on the mapPrivate wells in Shasta County
Across the county's systems

Highest result for each contaminant

One row per contaminant: the highest result any system in the county reported, against its limit. Open a row for the systems behind it.

Perfluorooctanoic acid (PFOA)Detected in 1 system of 2 tested4.0 ng/L federal MCL (2024) · US EPAHighest16.2 ng/L
Perfluorooctanesulfonic acid (PFOS)Detected in 1 system of 2 tested4.0 ng/L federal MCL (2024) · US EPAHighest12.6 ng/L
LithiumDetected in 1 system of 3 tested10 µg/L EPA health reference level (screening, not a legal limit) · US EPAHighest27.8 µg/L
  • CITY OF REDDING27.8 µg/LSample date: 2023-03-07 to 2023-12-05
  • CITY OF ANDERSONNot detected · below 9.0 µg/L lab reporting limitSample date: 2024-07-18
  • CITY OF SHASTA LAKENot detected · below 9.0 µg/L lab reporting limitSample date: 2024-04-03 to 2025-01-06
Perfluorohexanesulfonic acid (PFHxS)Detected in 1 system of 2 tested10 ng/L federal MCL (2024) · US EPAHighest8.9 ng/L
Lead (90th percentile)Detected in 3 systems15 µg/L federal action level · US EPAHighest2.4 µg/L
Perfluorobutanesulfonic acid (PFBS)Detected in 1 system of 2 tested2,000 ng/L EPA health advisory (screening, not a legal limit) · US EPAHighest8.9 ng/L
Perfluorohexanoic acid (PFHxA)Detected in 1 system of 2 tested400,000 ng/L Michigan EGLE state MCL (strictest US state) · Michigan EGLEHighest6.8 ng/L
Perfluoroheptanoic acid (PFHpA)Detected in 1 system of 2 testedNo federal or state limit; shown for transparencyHighest5.1 ng/L
1 more contaminant detectedShow
Perfluoropentanoic acid (PFPeA)Detected in 1 system of 2 testedNo federal or state limit; shown for transparencyHighest6.4 ng/L
22 PFAS tested, none detected in any systemShow

Tested in these 2 systems: CITY OF REDDING, CITY OF SHASTA LAKE

  • 11-Chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS)
  • 1H, 1H, 2H, 2H-perfluorodecane sulfonic acid (8:2 FTS)
  • 1H, 1H, 2H, 2H-perfluorohexane sulfonic acid (4:2 FTS)
  • 1H, 1H, 2H, 2H-perfluorooctane sulfonic acid (6:2 FTS)
  • 4,8-Dioxa-3H-perfluorononanoic acid (ADONA)
  • 9-Chlorohexadecafluoro-3-oxanone-1-sulfonic acid (9Cl-PF3ONS)
  • Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals)
  • N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA)

    Also tested in: CITY OF ANDERSON

  • N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA)

    Also tested in: CITY OF ANDERSON

  • Nonafluoro-3,6-dioxaheptanoic acid (NFDHA)
  • Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA)
  • Perfluoro-3-methoxypropanoic acid (PFMPA)
  • Perfluoro-4-methoxybutanoic acid (PFMBA)
  • Perfluorobutanoic acid (PFBA)
  • Perfluorodecanoic acid (PFDA)
  • Perfluorododecanoic acid (PFDoA)
  • Perfluoroheptanesulfonic acid (PFHpS)
  • Perfluorononanoic acid (PFNA)
  • Perfluoropentanesulfonic acid (PFPeS)
  • Perfluorotetradecanoic acid (PFTA)

    Also tested in: CITY OF ANDERSON

  • Perfluorotridecanoic acid (PFTrDA)

    Also tested in: CITY OF ANDERSON

  • Perfluoroundecanoic acid (PFUnA)
3 cities

Cities ranked by the records

Showing 3 of 3 cities · scores are system-level, not tap tests

Ranked by the Purity Score of each city's main water system, highest first. Scores belong to water systems; there is no county score. The score is computed only from contaminants measured in the published EPA record, so this ranks the record, not which city's water is safest. How the score works.

PFAS in Shasta County1 of 3 city reports had a PFAS sample above a 2024 EPA limit
  1. Redding12.6 ng/L
4.0 ng/L federal MCL · PFOS, ng/LPFAS in California
Lead

0of 3 cities above the 15 µg/L action level

Based on each system's 90th-percentile result. Lead from household plumbing isn't in this record.

Lead in California
Who supplies the county

Largest water systems

  1. ReddingCITY OF REDDING · CA4510005
    90,254 served
  2. AndersonCITY OF ANDERSON · CA4510001
    11,323 served
  3. Shasta LakeCITY OF SHASTA LAKE · CA4510006
    10,371 served
Questions

Frequently asked

How does Shasta County tap water compare across cities?

PurityMap ranks 3 cities in Shasta County by the Purity Score of each city's main water system, computed only from contaminants measured in the published EPA record. Scores belong to water systems, not to cities. The highest published score is Shasta Lake's main water system: CITY OF SHASTA LAKE · PWSID CA4510006 · Purity Score 99 (Excellent) · Confidence: moderate · Assessed at the water-system level. The ranking compares the records, not which city's water is safest, and your own tap can differ with household plumbing.

How many Shasta County cities had a PFAS sample above a 2024 EPA limit?

1 of 3 Shasta County city reports had a PFAS sample above a 2024 EPA limit in EPA's UCMR 5 testing, including Redding (PFOA 16.2 ng/L). That limit is judged on a yearly average, and water systems have until 2029 to meet it, so a single sample is not a violation. PFAS were detected at any level in 1.

Is there lead in Shasta County tap water?

Utilities report lead as a 90th-percentile result from home taps. 3 of 3 Shasta County cities reported a value above zero, and none was above the 15 µg/L federal action level. Lead usually comes from a building's own pipes and fixtures, so only a test at your tap tells you what you drink.

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