Tomball, TX: 4 Violations — 78/100 (2026)
2 ZIP codes · 7 water systems · Updated 2026-06-03
Tap water monitoring data for Tomball shows a consistently clean picture in TX — few violations on record, compliance well above the median.
How Tomball Compares
Data: EPA SDWIS Last verified: 2026-06-03
What You Should Know About Tomball Water
- Your city's water systems recorded 4 violations in the past 5 years.
- Average lead level: 0.0016 mg/L.
- Homes built before 1986: 17% — older plumbing may contain lead solder.
- Estimated remediation: $2,650 per household.
- CDC health risk index: 11.98.
Who Supplies Your Water in Tomball
Across Tomball, TX, residential water comes from 3 primary utilities rather than a single consolidated provider. Each system operates independently — managing its own distribution infrastructure, rate schedules, and EPA compliance filings. Federal records track 7 water systems in the area, with these top providers accounting for the majority of residential connections.
Overview
We track water quality and home safety data for 2 ZIP codes in Tomball, Texas, covering 7 community water systems serving approximately 110,352 people.
2 of 2 ZIP codes (100%) have recorded EPA violations. All violations are monitoring/reporting type.
Home Safety Score
Average Home Safety Score for Tomball: B (78/100)
The score combines three factors:
| Factor | What It Measures |
|---|---|
| Water Quality | EPA violations and compliance history |
| Lead Levels | 90th percentile lead concentration vs EPA action level |
| Radon Risk | EPA radon zone classification |
Water Sources
Tomball water systems draw from: Groundwater.
Lead & Copper
- Average lead level (90th percentile): 0.0016 mg/L (EPA action level: 0.015 mg/L)
- 0 ZIP codes exceed the EPA lead action level
Radon Risk
Dominant radon zone: Zone 3 (Low Risk)
- Zone 1 (High): 0 ZIP codes
- Zone 2 (Moderate): 0 ZIP codes
- Zone 3 (Low): 2 ZIP codes
Top Contaminants
| Contaminant | Category | Violations | ZIPs Affected |
|---|---|---|---|
| Lead and Copper Rule | Treatment Technique | 3 | 2 |
| Revised Total Coliform Rule | Microbiological | 3 | 2 |
Areas with Most Violations
| ZIP Code | Safety Score | Violations | Health-Based | System |
|---|---|---|---|---|
| 77375 | B | 2 | 0 | City of Tomball |
| 77377 | B | 2 | 0 | City of Tomball |
All ZIP Codes in Tomball
Data Sources
- Water quality: EPA Safe Drinking Water Information System (SDWIS)
- Lead/copper: EPA Lead and Copper Rule sampling data
- Radon: EPA Map of Radon Zones
Updated daily.
Health Outcomes in Tomball
Source: CDC PLACES (County-level estimates). Water contamination can correlate with respiratory and chronic health conditions.
Compared to National Average
Vertical line = national average. ■ Above national · ■ Below national
Top Contaminants in Tomball Water
Based on EPA violation records. Check your ZIP code report for system-specific contaminant data.
Housing & Infrastructure in Tomball
Housing age data helps assess potential lead pipe and infrastructure risks. Newer housing stock generally means lower plumbing-related contamination risk.
Source: U.S. Census Bureau American Community Survey (ACS).
Housing Age Profile
Housing age matters for water quality because lead solder was widely used in plumbing until the 1986 federal ban. Tomball's median build year of 2005 suggests a majority of homes were constructed under the newer standard — a meaningful factor when assessing household-level lead risk from tap water.
Most homes in Tomball were built after 1986, reducing the risk of lead contamination from plumbing. Older homes should still be tested.
Source: U.S. Census Bureau ACS B25034.
Cost Context: What Remediation Means for Tomball Homeowners
At current valuations, Tomball sits in the low remediation-share tier — the equity impact of fixing documented issues is proportionally minor.
Remediation costs in Tomball are relatively low compared to home values. The $1,800–$4,050 estimated range is a small fraction of median property value. Home values are 54% above the Texas average.
Lead Exposure Risk for Children in Tomball
Why children are most at risk: The CDC states there is no safe level of lead exposure for children. Children under 6 absorb lead more readily than adults, and even low levels can cause developmental delays, learning difficulties, and behavioral problems.
Confirming what flows from a specific faucet still requires a one-home draw, even where Tomball averages stay clean and the pre-rule housing share holds at 17%.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
Flood & Climate Risk in Tomball
Substantially more flood exposure than most communities appears in Tomball's NFIP record — 1048 documented claims and 100% of ZIP codes in FEMA flood zones. That exposure level makes the water-quality implications of flooding an active planning consideration rather than a background one.
Tomball has a significant flood history with 1,048 FEMA flood insurance claims on record, averaging $57,094 per claim. With 100% of ZIP codes in FEMA-designated flood zones, flood risk is a major concern for homeowners and water quality.
How flooding affects water quality: Flood events can introduce sewage, agricultural runoff, and industrial chemicals into water supplies. Even after floodwaters recede, contamination can persist in wells and aging infrastructure. Flood damage can add significantly to the estimated <strong>$2,650</strong> remediation cost per household.
Residents in flood-prone areas should consider flood insurance even outside FEMA zones — over 25% of flood claims come from low-to-moderate risk areas. After any flood event, test your water before drinking.
Source: FEMA National Flood Insurance Program (NFIP) claims data, FEMA flood zone designations.
Deep Dive Reports
Detailed analysis for Tomball, TX