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Limestone County, AL Water Quality

Water quality data for 3 public water systems serving Limestone County, Alabama — based on EPA SDWIS enforcement records, lead testing results, and health-based violation history.

📅 2026 Report 🔄 Data updated 2026 Q2 📍 3 water systems · 6 cities
✅
Generally Safe — Most Systems Performing Well

The majority of water systems have no active violations and lead levels well below the federal action level.

B

Limestone County Earns a B

Limestone County: 6 communities across 3 water systems. 100.0% have no open violations.

  • Median lead where detected: 1.88 ppb
  • 6 communities with a lead detection, 0 reporting none detected
  • 1 communities with PFAS above the federal limit
  • 0 with significant inspection deficiencies
  • 100.0% of communities have no open violations
1.88 ppb
Median Lead Level
County-wide, 90th percentile
3
Water Systems
Active CWS & NTNCWS
100%
Violation-Free
No active violations on record
How we grade counties: MyWaterIQ uses EPA SDWIS enforcement data — actual MCL violations and lead test results — not the aspirational MCLG targets used by some sites. A grade reflects real compliance history, not theoretical risk. Learn more →

Cities by Water Quality

⭐ Best Performing
  • Athens
    0.57 ppb
    1 health-based violation since 2015
    A
  • Madison
    1.88 ppb
    1 health-based violation since 2015
    A
  • Elkmont
    1.88 ppb
    1 health-based violation since 2015
    A
  • Lester
    1.88 ppb
    1 health-based violation since 2015
    A
  • Mooresville
    1.88 ppb
    1 health-based violation since 2015
    A
⚠ Needs Attention
  • Ardmore
    4.64 ppb
    PFAS above the limit at 3 of 3 sampling points
    D
  • Athens
    0.57 ppb
    1 health-based violation since 2015
    A
  • Madison
    1.88 ppb
    1 health-based violation since 2015
    A
  • Elkmont
    1.88 ppb
    1 health-based violation since 2015
    A
  • Lester
    1.88 ppb
    1 health-based violation since 2015
    A
County Lead Level — Median 1.88 ppb
Based on most recent 90th percentile lead tests across all reporting systems
0 ppb5 ppb10 ppb15 ppb
County median: 1.88 ppb — 12.5% of the federal action level
Systems by Lead Level
Under 5 ppb
6

All Cities in Limestone County

Athens 0.57 ppb A
Madison 1.88 ppb A
Ardmore 4.64 ppb D
Elkmont 1.88 ppb A
Lester 1.88 ppb A
Mooresville 1.88 ppb A
Showing 6 cities
No active violations Active violations

About Limestone County Drinking Water

Limestone County is served by 3 water systems covering 6 communities. No community here has an open violation on record.

Of the communities reporting lead results, 6 recorded a detection, with a median of 1.88 ppb — 13% of the federal action level. 0 reported none detected, which means below the laboratory limit rather than an absence of lead.

1 of 6 communities have PFAS above the limits EPA set in 2024, measured as a running annual average at each sampling point. State inspectors recorded no significant deficiencies.

Frequently Asked Questions

Is Limestone County tap water safe to drink?▼
No community in Limestone County has an open violation on record. 1 of 6 have PFAS above the federal limit, which is the main open concern.
What is the lead level in Limestone County?▼
Among communities with a detection the median is 1.88 ppb, 13% of the 15 ppb action level. 0 reported none detected and 0 reported no result.
How many water systems serve Limestone County?▼
3 community water systems serve 6 communities here.
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