CheckPFAS

ZIP 78336 · Texas

Aransas Pass, TX

Low Level
See the full Aransas Pass overview — all utilities & ZIP codes →

4 compounds detected

Trace detections — well below EPA limits

lithium no federal limit
53800.00 ppt
0 80700 ppt
PFBA no federal limit
13.00 ppt
0 19.5 ppt
PFPeA no federal limit
5.20 ppt
0 7.8 ppt
PFHxA no federal limit
3.40 ppt
0 5.1 ppt
Above EPA limit Below EPA limit No federal limit EPA MCL
PFAS Detected
9
Above EPA Limits
0
Water Systems
3
Highest % of MCL
N/A

Plain English

01What this means for you

Very low PFAS concentrations were detected — well below the EPA's Maximum Contaminant Level. For most healthy adults, this represents a minimal incremental risk from drinking water. The most proportionate response is to note the result and check your utility's Consumer Confidence Report again next year. If you have specific health concerns or vulnerable household members, speaking with your doctor and optionally installing a certified point-of-use filter is a reasonable step.

02NUECES COUNTY WCID 4

Low Level

PWSID · TX1780006

Water Type
Surface Water
PFAS Detected
2
Above MCL
0
State
Texas
Data Period
2023–2025

PFAS test results

CompoundDetectedvs. EPA LimitEPA LimitStatus
lithium
26000.00pptNo federal limitUnregulated
PFBA
Perfluorobutanoic acid
12.00pptNo federal limitUnregulated

03CITY OF ARANSAS PASS

Low Level

PWSID · TX2050015

Water Type
Surface Water
PFAS Detected
4
Above MCL
0
State
Texas
Data Period
2023–2025

PFAS test results

CompoundDetectedvs. EPA LimitEPA LimitStatus
lithium
53800.00pptNo federal limitUnregulated
PFBA
Perfluorobutanoic acid
11.00pptNo federal limitUnregulated
PFPeA
Perfluoropentanoic acid
5.20pptNo federal limitUnregulated
PFHxA
Perfluorohexanoic acid
3.40pptNo federal limitUnregulated

04RINCON WSC

Low Level

PWSID · TX2050078

Water Type
Surface Water
PFAS Detected
3
Above MCL
0
State
Texas
Data Period
2023–2025

PFAS test results

CompoundDetectedvs. EPA LimitEPA LimitStatus
lithium
26500.00pptNo federal limitUnregulated
PFBA
Perfluorobutanoic acid
13.00pptNo federal limitUnregulated
PFPeA
Perfluoropentanoic acid
3.10pptNo federal limitUnregulated

Note: ZIP code 78336 is served by 3 separate water utilities. Results above show data for each system independently.

Source & Methodology

About this data

Source
EPA UCMR 5
Data released
January 2026
Sampling period
January 2023 – December 2025
Systems tested
~10,000 public water systems
Water systems (PWSID)
TX1780006 · TX2050015 · TX2050078
Detection threshold (MRL)
~1.5–2 ppt

Values shown are the highest single-sample concentration measured at entry points to the distribution system. Results reflect water quality at the treatment plant — aging pipes, building plumbing, and on-site storage can affect what actually reaches your tap. "Not detected" means below the MRL, not literally zero.

View raw EPA UCMR 5 occurrence data →

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