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Limestone County, TX Water Quality

Water quality data for 6 public water systems serving Limestone County, Texas — based on EPA SDWIS enforcement records, lead testing results, and health-based violation history.

📅 2026 Report 🔄 Data updated 2026 Q2 📍 6 water systems · 6 cities
✅
Excellent — All Systems Performing Well

Water quality across the county is outstanding with minimal violations and very low lead levels.

A

Limestone County Earns a A

Limestone County: 6 communities across 6 water systems. 83.3% have no open violations.

  • Median lead where detected: 2.07 ppb
  • 1 communities with a lead detection, 5 reporting none detected
  • 0 communities with PFAS above the federal limit
  • 0 with significant inspection deficiencies
  • 83.3% of communities have no open violations
2.07 ppb
Median Lead Level
County-wide, 90th percentile
6
Water Systems
Active CWS & NTNCWS
83%
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
  • Kosse
    Not detected
    No federal limits exceeded on record
    B
  • Thornton
    Not detected
    No federal limits exceeded on record
    A
  • Tehuacana
    Not detected
    No federal limits exceeded on record
    B
  • Mexia
    2.07 ppb
    1 health-based violation since 2015
    B
  • Groesbeck
    Not detected
    31 health-based violations since 2015
    B
⚠ Needs Attention
  • Coolidge
    Not detected
    1 violation currently open
    D
  • Groesbeck
    Not detected
    31 health-based violations since 2015
    B
  • Mexia
    2.07 ppb
    1 health-based violation since 2015
    B
  • Kosse
    Not detected
    No federal limits exceeded on record
    B
  • Thornton
    Not detected
    No federal limits exceeded on record
    A
County Lead Level — Median 2.07 ppb
Based on most recent 90th percentile lead tests across all reporting systems
0 ppb5 ppb10 ppb15 ppb
County median: 2.07 ppb — 13.8% of the federal action level
Systems by Lead Level
Under 5 ppb
1
No Data
5

All Cities in Limestone County

Mexia 2.07 ppb B
Groesbeck Not detected B
Coolidge Not detected D
Kosse Not detected B
Thornton Not detected A
Tehuacana Not detected B
Showing 6 cities
No active violations Active violations

About Limestone County Drinking Water

Limestone County is served by 6 water systems covering 6 communities. 83% have no open violations.

Of the communities reporting lead results, 1 recorded a detection, with a median of 2.07 ppb — 14% of the federal action level. 5 reported none detected, which means below the laboratory limit rather than an absence of lead.

No community here has PFAS above the federal limit on record. State inspectors recorded no significant deficiencies.

Frequently Asked Questions

Is Limestone County tap water safe to drink?▼
83% of communities have no open violation. No community has PFAS above the federal limit on record.
What is the lead level in Limestone County?▼
Among communities with a detection the median is 2.07 ppb, 14% of the 15 ppb action level. 5 reported none detected and 0 reported no result.
How many water systems serve Limestone County?▼
6 community water systems serve 6 communities here.
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