CheckPFAS

ZIP Code 96001

High Risk
High Risk PFAS Risk Level

PFAS above EPA limits detected

2 compounds exceed EPA Maximum Contaminant Levels in water serving this ZIP code. Standard pitcher filters like Brita do not remove PFAS. See filter recommendations below.

8
PFAS Detected
2
Above EPA Limits
1
Water System
405%
Highest % of MCL

Compounds Exceeding EPA Limits

PFOA Exceeds EPA limit
0 ppt MCL: 4 ppt 405% of limit
Detected: 16.20 ppt
PFOS Exceeds EPA limit
0 ppt MCL: 4 ppt 315% of limit
Detected: 12.60 ppt
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CITY OF REDDING

CA4510005 High Risk
Water Type
Groundwater
PFAS Detected
8
Above MCL
2
State
California
Data Period
2023–2025

PFAS Test Results

CompoundDetectedvs. EPA LimitEPA LimitStatus
PFOA
Perfluorooctanoic acid
16.20ppt
405% of limit
4 ppt⚠ Exceeds MCL
PFOS
Perfluorooctane sulfonic acid
12.60ppt
315% of limit
4 ppt⚠ Exceeds MCL
PFHxS
Perfluorohexane sulfonic acid
8.90ppt
89% of limit
10 pptBelow limit
lithium
27800.00pptNo federal limit—Unregulated
PFBS
Perfluorobutane sulfonic acid
8.90pptNo federal limit—Unregulated
PFHxA
Perfluorohexanoic acid
6.80pptNo federal limit—Unregulated
PFPeA
Perfluoropentanoic acid
6.40pptNo federal limit—Unregulated
PFHpA
Perfluoroheptanoic acid
5.10pptNo federal limit—Unregulated

Data source: EPA Unregulated Contaminant Monitoring Rule, 5th cycle (UCMR 5) — January 2026 release.

UCMR 5 tested ~10,000 public water systems serving more than 25 people between 2023-2025 for 29 PFAS compounds.

Detection values represent the highest single-sample result measured at entry points to the distribution system.

View raw EPA data →