Calhoun County Water Quality
Calhoun 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.
Perfluorooctanoic acid (PFOA)CITY OF PORT LAVACA4.0 ng/L federal MCL (2024) · US EPA6 ng/L
- CITY OF PORT LAVACA6 ng/LSample date: 2023-04-18 to 2024-08-14
LithiumCITY OF PORT LAVACA10 µg/L EPA health reference level (screening, not a legal limit) · US EPA14.9 µg/L
- CITY OF PORT LAVACA14.9 µg/LSample date: 2023-04-18 to 2024-01-22
Perfluorooctanesulfonic acid (PFOS)CITY OF PORT LAVACA4.0 ng/L federal MCL (2024) · US EPA4.7 ng/L
- CITY OF PORT LAVACA4.7 ng/LSample date: 2023-04-18 to 2024-08-14
Perfluorohexanesulfonic acid (PFHxS)CITY OF PORT LAVACA10 ng/L federal MCL (2024) · US EPA7.2 ng/L
- CITY OF PORT LAVACA7.2 ng/LSample date: 2023-04-18 to 2024-08-14
Lead (90th percentile)CITY OF PORT LAVACA15 µg/L federal action level · US EPA2.31 µg/L
- CITY OF PORT LAVACA2.31 µg/LMonitoring period: 2024–2024
Perfluorobutanesulfonic acid (PFBS)CITY OF PORT LAVACA2,000 ng/L EPA health advisory (screening, not a legal limit) · US EPA6.5 ng/L
- CITY OF PORT LAVACA6.5 ng/LSample date: 2023-04-18 to 2024-08-14
Perfluorohexanoic acid (PFHxA)CITY OF PORT LAVACA400,000 ng/L Michigan EGLE state MCL (strictest US state) · Michigan EGLE10 ng/L
- CITY OF PORT LAVACA10 ng/LSample date: 2023-04-18 to 2024-08-14
Perfluorobutanoic acid (PFBA)CITY OF PORT LAVACANo federal or state limit; shown for transparency14.2 ng/L
- CITY OF PORT LAVACA14.2 ng/LSample date: 2023-04-18 to 2024-08-14
1 more contaminant detectedShow
Perfluoropentanoic acid (PFPeA)CITY OF PORT LAVACANo federal or state limit; shown for transparency16.3 ng/L
- CITY OF PORT LAVACA16.3 ng/LSample date: 2023-04-18 to 2024-08-14
22 PFAS tested, none detected in this systemShow
Tested in this system: CITY OF PORT LAVACA
- 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)
- Perfluoroheptanoic acid (PFHpA)
- 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
- Port LavacaCITY OF PORT LAVACA · TX029000212,000 served
Frequently asked
How does Calhoun County tap water compare across cities?
PurityMap ranks 1 city in Calhoun 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 Port Lavaca's main water system: CITY OF PORT LAVACA · PWSID TX0290002 · Purity Score 51 (Poor) · 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 Calhoun County cities had a PFAS sample above a 2024 EPA limit?
1 of 1 Calhoun County city report had a PFAS sample above a 2024 EPA limit in EPA's UCMR 5 testing, including Port Lavaca (PFOA 6 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 Calhoun County tap water?
Utilities report lead as a 90th-percentile result from home taps. 1 of 1 Calhoun 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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