Tehama County Water Quality

Name: Tehama County Water Quality Data (2026)
Creator: PurityMap
License: https://creativecommons.org/licenses/by/4.0/

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

Find my system Open on the map Private wells in Tehama 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)CITY OF RED BLUFF4.0 ng/L federal MCL (2024) · US EPA7.4 ng/L

CITY OF RED BLUFF7.4 ng/LSample date: 2024-01-11 to 2024-12-17

Perfluorohexanoic acid (PFHxA)CITY OF RED BLUFF400,000 ng/L Michigan EGLE state MCL (strictest US state) · Michigan EGLE6 ng/L

CITY OF RED BLUFF6 ng/LSample date: 2024-01-11 to 2024-12-17

Perfluoroheptanoic acid (PFHpA)CITY OF RED BLUFFNo federal or state limit; shown for transparency5.5 ng/L

CITY OF RED BLUFF5.5 ng/LSample date: 2024-01-11 to 2024-12-17

Perfluoropentanoic acid (PFPeA)CITY OF RED BLUFFNo federal or state limit; shown for transparency6.7 ng/L

CITY OF RED BLUFF6.7 ng/LSample date: 2024-01-11 to 2024-12-17

27 substances tested, none detected in this systemShow

Tested in this system: CITY OF RED BLUFF

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)
Lead (90th percentile)
Lithium
N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA)
N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA)
Nonafluoro-3,6-dioxaheptanoic acid (NFDHA)
Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA)
Perfluoro-3-methoxypropanoic acid (PFMPA)
Perfluoro-4-methoxybutanoic acid (PFMBA)
Perfluorobutanesulfonic acid (PFBS)
Perfluorobutanoic acid (PFBA)
Perfluorodecanoic acid (PFDA)
Perfluorododecanoic acid (PFDoA)
Perfluoroheptanesulfonic acid (PFHpS)
Perfluorohexanesulfonic acid (PFHxS)
Perfluorononanoic acid (PFNA)
Perfluorooctanesulfonic acid (PFOS)
Perfluoropentanesulfonic acid (PFPeS)
Perfluorotetradecanoic acid (PFTA)
Perfluorotridecanoic acid (PFTrDA)
Perfluoroundecanoic acid (PFUnA)

1 city

Cities ranked by the records

1
Red BluffCITY OF RED BLUFF
PFAS sample above a limit
Open city report →

Showing 1 of 1 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 Tehama County1 of 1 city report had a PFAS sample above a 2024 EPA limit

4.0 ng/L federal MCL · PFOS, ng/LPFAS in California

Lead

0of 1 city 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

Red BluffCITY OF RED BLUFF · CA5210004
14,286 served

Questions

Frequently asked

How does Tehama County tap water compare across cities?

PurityMap ranks 1 city in Tehama 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 Red Bluff's main water system: CITY OF RED BLUFF · PWSID CA5210004 · Purity Score 61 (Fair) · 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 Tehama County cities had a PFAS sample above a 2024 EPA limit?

1 of 1 Tehama County city report had a PFAS sample above a 2024 EPA limit in EPA's UCMR 5 testing, including Red Bluff (PFOA 7.4 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 Tehama County tap water?

Utilities report lead as a 90th-percentile result from home taps. 0 of 1 Tehama 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.

Next step

Follow Tehama County's water

Get an email when a city record in the county changes. Or go straight to the filters certified for what was found here.