CheckPFAS

ZIP Code 35611

High Risk
High Risk PFAS Risk Level

PFAS above EPA limits detected

2 compounds exceed EPA Maximum Contaminant Levels in water serving this ZIP code. Standard pitcher filters like Brita do not remove PFAS. See filter recommendations below.

7
PFAS Detected
2
Above EPA Limits
1
Water System
278%
Highest % of MCL

Compounds Exceeding EPA Limits

PFOS Exceeds EPA limit
0 ppt MCL: 4 ppt 278% of limit
Detected: 11.10 ppt
PFOA Exceeds EPA limit
0 ppt MCL: 4 ppt 218% of limit
Detected: 8.70 ppt
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LIMESTONE COUNTY WATER SYSTEM

AL0000833 High Risk
Water Type
GU
PFAS Detected
7
Above MCL
2
State
Alabama
Data Period
2023–2025

PFAS Test Results

CompoundDetectedvs. EPA LimitEPA LimitStatus
PFOS
Perfluorooctane sulfonic acid
11.10ppt
278% of limit
4 ppt⚠ Exceeds MCL
PFOA
Perfluorooctanoic acid
8.70ppt
218% of limit
4 ppt⚠ Exceeds MCL
PFHxS
Perfluorohexane sulfonic acid
6.80ppt
68% of limit
10 pptBelow limit
PFBA
Perfluorobutanoic acid
24.90pptNo federal limit—Unregulated
PFBS
Perfluorobutane sulfonic acid
12.40pptNo federal limit—Unregulated
PFHxA
Perfluorohexanoic acid
7.50pptNo federal limit—Unregulated
PFPeA
Perfluoropentanoic acid
7.20pptNo federal limit—Unregulated

Data source: EPA Unregulated Contaminant Monitoring Rule, 5th cycle (UCMR 5) — January 2026 release.

UCMR 5 tested ~10,000 public water systems serving more than 25 people between 2023-2025 for 29 PFAS compounds.

Detection values represent the highest single-sample result measured at entry points to the distribution system.

View raw EPA data →