Guadalupe County Water Quality: 3 Cities Ranked by the Records
Guadalupe County, Texas: 3 city reports 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.
LithiumDetected in 3 systems10 µg/L EPA health reference level (screening, not a legal limit) · US EPAHighest37 µg/L
- CITY OF CIBOLO37 µg/LSample date: 2023-03-01 to 2023-12-22
- CITY OF SEGUIN18.6 µg/LSample date: 2023-12-27 to 2024-09-12
- NEW BRAUNFELS UTILITIES17 µg/LSample date: 2024-06-18 to 2025-03-12
Perfluorohexanesulfonic acid (PFHxS)Detected in 1 system of 3 tested10 ng/L federal MCL (2024) · US EPAHighest3.7 ng/L
- NEW BRAUNFELS UTILITIES3.7 ng/LSample date: 2024-06-18 to 2025-03-12
- CITY OF CIBOLONot detected · below 3.0 ng/L lab reporting limitSample date: 2023-03-01 to 2023-12-22
- CITY OF SEGUINNot detected · below 3.0 ng/L lab reporting limitSample date: 2023-12-27 to 2024-09-12
Lead (90th percentile)Detected in 3 systems15 µg/L federal action level · US EPAHighest1.7 µg/L
- NEW BRAUNFELS UTILITIES1.7 µg/LMonitoring period: 2023–2025
- CITY OF SEGUIN1.45 µg/LMonitoring period: 2023–2025
- CITY OF CIBOLO1.1 µg/LMonitoring period: 2023–2025
Perfluorohexanoic acid (PFHxA)Detected in 1 system of 3 tested400,000 ng/L Michigan EGLE state MCL (strictest US state) · Michigan EGLEHighest3 ng/L
- NEW BRAUNFELS UTILITIES3 ng/LSample date: 2024-06-18 to 2025-03-12
- CITY OF CIBOLONot detected · below 3.0 ng/L lab reporting limitSample date: 2023-03-01 to 2023-12-22
- CITY OF SEGUINNot detected · below 3.0 ng/L lab reporting limitSample date: 2023-12-27 to 2024-09-12
Perfluorobutanoic acid (PFBA)Detected in 3 systemsNo federal or state limit; shown for transparencyHighest10.2 ng/L
- NEW BRAUNFELS UTILITIES10.2 ng/LSample date: 2024-06-18 to 2025-03-12
- CITY OF SEGUIN9.7 ng/LSample date: 2023-12-27 to 2024-09-12
- CITY OF CIBOLO5.4 ng/LSample date: 2023-03-01 to 2023-12-22
Perfluoropentanoic acid (PFPeA)Detected in 2 systems of 3 testedNo federal or state limit; shown for transparencyHighest3.9 ng/L
- CITY OF SEGUIN3.9 ng/LSample date: 2023-12-27 to 2024-09-12
- NEW BRAUNFELS UTILITIES3.4 ng/LSample date: 2024-06-18 to 2025-03-12
- CITY OF CIBOLONot detected · below 3.0 ng/L lab reporting limitSample date: 2023-03-01 to 2023-12-22
25 PFAS tested, none detected in any systemShow
Tested in these 3 systems: CITY OF CIBOLO, CITY OF SEGUIN, NEW BRAUNFELS UTILITIES
- 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)
- Perfluorobutanesulfonic acid (PFBS)
- Perfluorodecanoic acid (PFDA)
- Perfluorododecanoic acid (PFDoA)
- Perfluoroheptanesulfonic acid (PFHpS)
- Perfluoroheptanoic acid (PFHpA)
- Perfluorononanoic acid (PFNA)
- Perfluorooctanesulfonic acid (PFOS)
- Perfluorooctanoic acid (PFOA)
- 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 3 cities 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
- New BraunfelsNEW BRAUNFELS UTILITIES · TX0460001116,477 served
- SeguinCITY OF SEGUIN · TX094000232,736 served
- CiboloCITY OF CIBOLO · TX094001820,331 served
Frequently asked
How does Guadalupe County tap water compare across cities?
PurityMap ranks 3 cities in Guadalupe 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 Cibolo's main water system: CITY OF CIBOLO · PWSID TX0940018 · Purity Score 99 (Excellent) · 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 Guadalupe County cities had a PFAS sample above a 2024 EPA limit?
None of the 3 Guadalupe County city reports had a PFAS sample above a 2024 EPA limit in EPA's UCMR 5 testing. PFAS were detected below the limit in 3.
Is there lead in Guadalupe County tap water?
Utilities report lead as a 90th-percentile result from home taps. 3 of 3 Guadalupe 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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