A
96

Excellent Water Quality

Madisonville, TX 77864

Madison County · Population served: 7,634 · Data updated March 2026

Water Systems Serving This Area

🌊
CITY OF MADISONVILLE
Groundwater · Pop. 6,111
PWSID: TX1570001
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HIGH PRAIRIE WATER SUPPLY CORP
Groundwater · Pop. 1,494
PWSID: TX1570018
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OSR ESTATES SUBDIVISION
Groundwater · Pop. 29
PWSID: TX1570023

Violation History (Last 5 Years)

2Total (5yr)
0Health-Based
0Major

Water Quality Summary

Understanding Your Water in Madisonville

Tap water quality in Madisonville, Texas (77864) receives an overall grade of A (Excellent) with a score of 96 out of 100, based on analysis of EPA compliance data, contaminant testing, and violation history. This is 28 points above the Texas state average of 68. Compared to the national average (75), this area performs significantly better. The area is served by 3 water systems providing water to approximately 7,634 people, using groundwater sources.

Your Score 96/100 A
vs State 28 pts above Texas avg (68)
vs National 21 pts above national avg (75)

What a Grade A Means

A score of 96/100 means the water supply in Madisonville, TX meets or exceeds all EPA standards with minimal issues. Contaminant levels are well within safe limits, and the water system has maintained a strong compliance record. While no water supply is guaranteed perfect at the tap due to household plumbing, this is among the best-scoring areas in the country.

Groundwater: drawn from underground aquifers via wells

Common Questions

Frequently Asked Questions

Based on EPA data, tap water in Madisonville, Texas receives a grade of A (Excellent) with a score of 96/100. This indicates the water meets federal standards and has relatively few concerns. However, individual homes may still have localized issues such as lead from old plumbing.

ZIP code 77864 is served by 3 water systems using groundwater sources, providing water to approximately 7,634 people. Groundwater is naturally filtered through rock and soil, often requiring less treatment. However, it can be vulnerable to contamination from underground sources like naturally occurring arsenic, nitrates from agriculture, or PFAS from industrial sites.

No lead data is currently available for ZIP code 77864. This may mean lead testing results haven't been reported recently, or the serving water system uses monitoring waivers. You can request a free lead test kit from most water utilities or purchase a certified home testing kit.

No PFAS ("forever chemicals") were detected in water systems serving Madisonville, Texas during the most recent EPA monitoring period (UCMR5). However, not all water systems have been tested for all PFAS compounds, and new contamination can occur over time.

Water systems serving Madisonville, Texas have received 2 violations in the last 5 years. Violations can range from paperwork issues (monitoring & reporting) to serious health-based violations where contaminant levels exceeded safe limits. Review the violation details above for specifics.

Water in Madisonville, Texas shows no major contaminant concerns based on available data. A basic carbon filter can improve taste and reduce chlorine. For extra peace of mind, an NSF-certified pitcher filter or faucet-mount filter provides an affordable layer of protection.

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