Kendall County Water Quality
Kendall 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.
Perfluorooctanesulfonic acid (PFOS)CITY OF BOERNE4.0 ng/L federal MCL (2024) · US EPA26.3 ng/L
- CITY OF BOERNE26.3 ng/LSample date: 2024-07-10 to 2025-04-09
Perfluorohexanesulfonic acid (PFHxS)CITY OF BOERNE10 ng/L federal MCL (2024) · US EPA24.7 ng/L
- CITY OF BOERNE24.7 ng/LSample date: 2024-07-10 to 2025-04-09
LithiumCITY OF BOERNE10 µg/L EPA health reference level (screening, not a legal limit) · US EPA20.8 µg/L
- CITY OF BOERNE20.8 µg/LSample date: 2024-07-10 to 2025-04-09
Perfluorooctanoic acid (PFOA)CITY OF BOERNE4.0 ng/L federal MCL (2024) · US EPA6 ng/L
- CITY OF BOERNE6 ng/LSample date: 2024-07-10 to 2025-04-09
Lead (90th percentile)CITY OF BOERNE15 µg/L federal action level · US EPA1.4 µg/L
- CITY OF BOERNE1.4 µg/LMonitoring period: 2023–2025
Perfluorobutanesulfonic acid (PFBS)CITY OF BOERNE2,000 ng/L EPA health advisory (screening, not a legal limit) · US EPA10 ng/L
- CITY OF BOERNE10 ng/LSample date: 2024-07-10 to 2025-04-09
Perfluorohexanoic acid (PFHxA)CITY OF BOERNE400,000 ng/L Michigan EGLE state MCL (strictest US state) · Michigan EGLE7.4 ng/L
- CITY OF BOERNE7.4 ng/LSample date: 2024-07-10 to 2025-04-09
Perfluorobutanoic acid (PFBA)CITY OF BOERNENo federal or state limit; shown for transparency6.6 ng/L
- CITY OF BOERNE6.6 ng/LSample date: 2024-07-10 to 2025-04-09
1 more contaminant detectedShow
Perfluoropentanoic acid (PFPeA)CITY OF BOERNENo federal or state limit; shown for transparency6.4 ng/L
- CITY OF BOERNE6.4 ng/LSample date: 2024-07-10 to 2025-04-09
22 PFAS tested, none detected in this systemShow
Tested in this system: CITY OF BOERNE
- 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
- BoerneCITY OF BOERNE · TX130000124,769 served
Frequently asked
How does Kendall County tap water compare across cities?
PurityMap ranks 1 city in Kendall 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 Boerne's main water system: CITY OF BOERNE · PWSID TX1300001 · Purity Score 50 (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 Kendall County cities had a PFAS sample above a 2024 EPA limit?
1 of 1 Kendall County city report had a PFAS sample above a 2024 EPA limit in EPA's UCMR 5 testing, including Boerne (PFOS 26.3 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 Kendall County tap water?
Utilities report lead as a 90th-percentile result from home taps. 1 of 1 Kendall 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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