Tap Water Quality Report
Tap water quality in REDDING, California
Tap water in REDDING, California receives a grade of F (54/100) from TapWaterSafety.org. It's served by CITY OF REDDING. The most significant water quality concerns are: PFAS contamination; Arsenic significantly above health guideline; Perfluorohexane sulfonate (PFHXS) significantly above health guideline; Haloacetic acids (HAA9) significantly above health guideline. Data sources: EPA SDWIS, EPA ECHO, EWG Tap Water Database.
What's in REDDING's tap water
Top water quality concerns identified by the EPA and Environmental Working Group across the utility serving REDDING.
PFAS contamination
Severe concernPerfluorooctane sulfonate (PFOS), Perfluorooctanoic acid (PFOA) detected. PFAS are persistent chemicals linked to cancer and immune effects with no known safe exposure threshold.
Arsenic significantly above health guideline
Moderate concernArsenic detected at 6.65 ppb, 1664x above the EWG health guideline of 0.004 ppb.
Perfluorohexane sulfonate (PFHXS) significantly above health guideline
Moderate concernPerfluorohexane sulfonate (PFHXS) detected at 1.06 ppt, 1064x above the EWG health guideline of 0.001 ppt.
Haloacetic acids (HAA9) significantly above health guideline
Moderate concernHaloacetic acids (HAA9) detected at 30.7 ppb, 512x above the EWG health guideline of 0.06 ppb.
EPA compliance record
Official U.S. EPA records for CITY OF REDDING (system ID CA4510005) for the last 3 years. Checked 2026-10-07.
Source: U.S. EPA Enforcement and Compliance History Online (ECHO), from the Safe Drinking Water Information System. See EPA's full report.
Recommended filters for REDDING
Filters matched to the specific contaminants in REDDING's water supply.
Filter certified for PFOA/PFOS (NSF/ANSI 53 or 58)
$180-$750Reverse osmosis and some carbon block filters reduce PFAS. Look for certification to NSF/ANSI 53 or 58 for PFOA/PFOS.
Reverse osmosis certified for arsenic (NSF/ANSI 58)
$429-$599Reverse osmosis certified under NSF/ANSI 58 for arsenic is the most reliable home option.
Carbon filter certified for VOCs (NSF/ANSI 53)
$180-$599Activated carbon is effective for disinfection byproducts. Look for NSF/ANSI 53 VOC reduction.
Disclosure: TapWaterSafety earns a commission from purchases made through these links. This does not influence our scoring methodology or filter selection.
All contaminants detected in REDDING's tap water
Every contaminant identified, compared side-by-side against US EPA legal limits, the EU Drinking Water Directive (2020/2184), WHO Guidelines, and California's Public Health Goal. Why we show multiple standards →
| Contaminant | Detected | EWG US health-based |
EPA US legal |
EU DWD Europe |
WHO global |
CA PHG strictest US |
Tested sample year |
Status |
|---|---|---|---|---|---|---|---|---|
| Arsenic Heavy metal |
6.65 ppb | 0.004 | 10.0 | 10 | 10 | 0.004 | — | 1664× over |
| Perfluorohexane sulfonate (PFHXS) PFAS |
1.06 ppt | 0.001 | 10.0 | — | — | — | — | 1064× over |
| Haloacetic acids (HAA9) Disinfection byproduct |
30.7 ppb | 0.06 | — | — | — | — | — | 512× over |
| Haloacetic acids (HAA5) Disinfection byproduct |
36.2 ppb | 0.1 | 60.0 | 60 | — | — | — | 362× over |
| Total trihalomethanes (TTHMs) Disinfection byproduct |
27.0 ppb | 0.15 | 80.0 | 100 | — | — | — | 180× over |
| Trichloroacetic acid Disinfection byproduct |
13.3 ppb | 0.1 | — | — | — | — | — | 133× over |
| Chloroform Disinfection byproduct |
23.9 ppb | 0.4 | — | — | — | — | — | 60× over |
| Bromodichloromethane Disinfection byproduct |
3.01 ppb | 0.06 | — | — | — | — | — | 50× over |
| Dichloroacetic acid Disinfection byproduct |
8.92 ppb | 0.2 | — | — | — | — | — | 45× over |
| Chromium (hexavalent) Heavy metal |
0.214 ppb | 0.02 | — | — | — | — | — | 11× over |
| Nitrate Inorganic |
1.04 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 7.4× over |
| Perfluorooctane sulfonate (PFOS) PFAS |
1.55 ppt | 0.3 | 4.0 | 100 | 100 | 1 | — | 5.2× over |
| Dibromochloromethane Disinfection byproduct |
0.169 ppb | 0.1 | — | — | — | — | — | 1.7× over |
| Perfluorooctanoic acid (PFOA) PFAS |
0.134 ppt | 0.09 | 4.0 | 100 | 100 | 0.007 | — | 1.5× over |
| Manganese Heavy metal |
33.0 ppb | 100.0 | — | 50 | 80 | — | — | Below guideline |
| Vanadium Other |
2.45 ppb | 21.0 | — | — | — | — | — | Below guideline |
| Monobromoacetic acid Disinfection byproduct |
1.62 ppb | 25.0 | — | — | — | — | — | Below guideline |
| Barium Heavy metal |
43.0 ppb | 700.0 | 2000.0 | — | 1300 | 2000 | — | Below guideline |
| Monochloroacetic acid Disinfection byproduct |
0.561 ppb | 53.0 | — | — | — | — | — | Below guideline |
| Chloromethane Other |
0.021 ppb | 2.69 | — | — | — | — | — | Below guideline |
| Molybdenum Other |
0.181 ppb | 40.0 | — | — | — | — | — | Below guideline |
| Chlorate Disinfection byproduct |
0.558 ppb | 210.0 | — | — | — | — | — | Below guideline |
| Perfluorobutane sulfonate (PFBS) PFAS |
1.1 ppt | 2000.0 | — | — | — | — | — | Below guideline |
| Perfluoropentanoic Acid (PFPeA) PFAS |
0.422 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| Perfluorohexanoic Acid (PFHxA) PFAS |
0.192 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| Perfluoroheptanoic acid (PFHPA) PFAS |
0.142 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| Strontium Radiological |
0.138 ppb | 1500.0 | — | — | — | — | — | Below guideline |
| Fluoride Inorganic |
0.0138 ppm | — | 4.0 | 1.5 | 1.5 | — | — | Below guideline |
| Lithium Other |
2.47 ppb | — | — | — | — | — | — | Below guideline |
All values in the unit of the detected level. Red cells indicate the detected level exceeds that standard. Some contaminants have limits in some jurisdictions but not others (shown as —). The "Tested" column shows the year each contaminant sample was collected.
Sources: US EPA, EU Drinking Water Directive 2020/2184, WHO Guidelines, California OEHHA PHGs, EWG Tap Water Database.
Treatment plant contact info
For service issues, water quality concerns, or to request a Consumer Confidence Report from CITY OF REDDING.