Aransas County Water Quality

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

Aransas County, Texas: 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 Aransas 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.

LithiumCITY OF ROCKPORT10 µg/L EPA health reference level (screening, not a legal limit) · US EPA15.4 µg/L

CITY OF ROCKPORT15.4 µg/LSample date: 2023-03-23 to 2023-12-27

Lead (90th percentile)CITY OF ROCKPORT15 µg/L federal action level · US EPA3.42 µg/L

CITY OF ROCKPORT3.42 µg/LMonitoring period: 2024–2026 (still open)

Perfluorobutanoic acid (PFBA)CITY OF ROCKPORTNo federal or state limit; shown for transparency13.2 ng/L

CITY OF ROCKPORT13.2 ng/LSample date: 2023-03-23 to 2023-12-27

Perfluoropentanoic acid (PFPeA)CITY OF ROCKPORTNo federal or state limit; shown for transparency4.2 ng/L

CITY OF ROCKPORT4.2 ng/LSample date: 2023-03-23 to 2023-12-27

27 PFAS tested, none detected in this systemShow

Tested in this system: CITY OF ROCKPORT

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)
Perfluorohexanesulfonic acid (PFHxS)
Perfluorohexanoic acid (PFHxA)
Perfluorononanoic acid (PFNA)
Perfluorooctanesulfonic acid (PFOS)
Perfluorooctanoic acid (PFOA)
Perfluoropentanesulfonic acid (PFPeS)
Perfluorotetradecanoic acid (PFTA)
Perfluorotridecanoic acid (PFTrDA)
Perfluoroundecanoic acid (PFUnA)

1 city

Cities ranked by the records

1
RockportCITY OF ROCKPORT
PFAS detected, within limitLead below action level
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 Aransas CountyPFAS detected in 1 of 1 city; none had a sample above a 2024 EPA limit

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

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 Texas

Who supplies the county

Largest water systems

RockportCITY OF ROCKPORT · TX0040002
11,186 served

Questions

Frequently asked

How does Aransas County tap water compare across cities?

PurityMap ranks 1 city in Aransas 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 Rockport's main water system: CITY OF ROCKPORT · PWSID TX0040002 · Purity Score 95 (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 Aransas County cities had a PFAS sample above a 2024 EPA limit?

None of the 1 Aransas County city report had a PFAS sample above a 2024 EPA limit in EPA's UCMR 5 testing. PFAS were detected below the limit in 1.

Is there lead in Aransas County tap water?

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