Walker County Water Quality
Walker County, Texas: one city report built from EPA and utility records. A county has many suppliers; each city shows the system that serves it.
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.
LithiumCITY OF HUNTSVILLE10 µg/L EPA health reference level (screening, not a legal limit) · US EPA60.2 µg/L
- CITY OF HUNTSVILLE60.2 µg/LSample date: 2023-05-16 to 2024-02-07
Perfluorooctanesulfonic acid (PFOS)CITY OF HUNTSVILLE4.0 ng/L federal MCL (2024) · US EPA8.9 ng/L
- CITY OF HUNTSVILLE8.9 ng/LSample date: 2023-05-16 to 2024-03-11
Perfluorooctanoic acid (PFOA)CITY OF HUNTSVILLE4.0 ng/L federal MCL (2024) · US EPA6 ng/L
- CITY OF HUNTSVILLE6 ng/LSample date: 2023-05-16 to 2024-03-11
Perfluorohexanesulfonic acid (PFHxS)CITY OF HUNTSVILLE10 ng/L federal MCL (2024) · US EPA8.3 ng/L
- CITY OF HUNTSVILLE8.3 ng/LSample date: 2023-05-16 to 2024-03-11
Lead (90th percentile)CITY OF HUNTSVILLE15 µg/L federal action level · US EPA2.03 µg/L
- CITY OF HUNTSVILLE2.03 µg/LMonitoring period: 2024–2026 (still open)
Perfluorobutanesulfonic acid (PFBS)CITY OF HUNTSVILLE2,000 ng/L EPA health advisory (screening, not a legal limit) · US EPA9.5 ng/L
- CITY OF HUNTSVILLE9.5 ng/LSample date: 2023-05-16 to 2024-03-11
Perfluorohexanoic acid (PFHxA)CITY OF HUNTSVILLE400,000 ng/L Michigan EGLE state MCL (strictest US state) · Michigan EGLE17.9 ng/L
- CITY OF HUNTSVILLE17.9 ng/LSample date: 2023-05-16 to 2024-03-11
Perfluorobutanoic acid (PFBA)CITY OF HUNTSVILLENo federal or state limit; shown for transparency12.9 ng/L
- CITY OF HUNTSVILLE12.9 ng/LSample date: 2023-05-16 to 2024-03-11
2 more contaminants detectedShow
Perfluoroheptanoic acid (PFHpA)CITY OF HUNTSVILLENo federal or state limit; shown for transparency6.7 ng/L
- CITY OF HUNTSVILLE6.7 ng/LSample date: 2023-05-16 to 2024-03-11
Perfluoropentanoic acid (PFPeA)CITY OF HUNTSVILLENo federal or state limit; shown for transparency19.4 ng/L
- CITY OF HUNTSVILLE19.4 ng/LSample date: 2023-05-16 to 2024-03-11
21 PFAS tested, none detected in this systemShow
Tested in this system: CITY OF HUNTSVILLE
- 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)
- 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)
- Perfluorodecanoic acid (PFDA)
- Perfluorododecanoic acid (PFDoA)
- Perfluoroheptanesulfonic acid (PFHpS)
- Perfluorononanoic acid (PFNA)
- Perfluoropentanesulfonic acid (PFPeS)
- Perfluorotetradecanoic acid (PFTA)
- Perfluorotridecanoic acid (PFTrDA)
- Perfluoroundecanoic acid (PFUnA)
Cities ranked by the records
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.
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 TexasLargest water systems
- HuntsvilleCITY OF HUNTSVILLE · TX236000148,522 served
Frequently asked
How does Walker County tap water compare across cities?
PurityMap ranks 1 city in Walker 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 Huntsville's main water system: CITY OF HUNTSVILLE · PWSID TX2360001 · Purity Score 55 (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 Walker County cities had a PFAS sample above a 2024 EPA limit?
1 of 1 Walker County city report had a PFAS sample above a 2024 EPA limit in EPA's UCMR 5 testing, including Huntsville (PFOS 8.9 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 Walker County tap water?
Utilities report lead as a 90th-percentile result from home taps. 1 of 1 Walker 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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