Excellent Water Quality
Water Quality Summary
Tap water quality in Houston, Texas (77238) receives an overall grade of A (Excellent) with a score of 100 out of 100, based on analysis of EPA compliance data, contaminant testing, and violation history. This is 32 points above the Texas state average of 68. Compared to the national average (75), this area performs significantly better. The area is served by 2 water systems providing water to approximately 495 people, using groundwater sources. The area has a clean violation record over the past 5 years — a positive indicator of consistent water quality management.
A score of 100/100 means the water supply in Houston, 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.
Common Questions
Based on EPA data, tap water in Houston, Texas receives a grade of A (Excellent) with a score of 100/100. 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 77238 is served by 2 water systems using groundwater sources, providing water to approximately 495 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 77238. 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 Houston, 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 Houston, Texas have zero violations in the last 5 years. This is a positive indicator of consistent regulatory compliance and water quality management.
Water in Houston, 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.