Tomball, TX: PFAS Found in Water - Home Safety 77/100
2 ZIP codes · 10 water systems · Updated
ZipCheckup grade for Tomball: B.
The model grade is high, but the records on this page include findings worth reviewing.
Your top priority: match a filter's certification to the violations (10 health-based violations). NSF certified filters →
Looking at federal compliance records for Tomball, TX: the city earns a grade in the top two bands here, and each serving system's violation history can be reviewed individually for what lies behind it.
How Tomball Compares
Data: EPA SDWIS
What You Should Know About Tomball Water
- Your city's water systems recorded 100 violations since 2021.
- Average of reported 90th-percentile lead results: 0.0041 mg/L.
- Homes built before 1986: 17% - older plumbing may contain lead solder.
- Estimated remediation: $1,100 per household.
- Health risk index (ZipCheckup composite of CDC data): 11.98.
Who Supplies Your Water in Tomball
Among 10 systems linked to Tomball, TX, the 3 biggest by population served appear below.
- B
- B
- B
Overview
We track home safety data for 2 ZIP codes in Tomball, Texas, covering 10 community water systems serving approximately 110,352 people. The EPA snapshots used for this build directly map water systems to 2 of 2 ZIP codes.
2 of 2 ZIP codes with a reported violation count in the available EPA record (100%) have recorded EPA violations. 10 health-based violations appear in the available health breakdown.
Home Safety Score
Average Home Safety Score for Tomball: B (77/100)
Model 4.0.0 uses four measured components across three equally weighted domains. If a required domain is unavailable, no score is published:
| Factor | What It Measures |
|---|---|
| Water Quality | EPA violations and compliance history |
| PFAS MCL Screen | UCMR 5 testing against the covered federal MCLs |
| Radon Risk | EPA radon zone classification |
| Annual AQI | EPA AirData county-year median with at least 90 observed days |
Water Sources
Tomball water systems draw from: Groundwater, Surface water.
Lead & Copper
- Average of reported 90th-percentile lead results: 0.0041 mg/L (EPA action level: 0.015 mg/L)
- 0 of 2 ZIP codes with known status exceed the EPA lead action level
Radon Risk
2 of 2 ZIP records with known zones are in EPA Radon Zone 3.
The EPA recommends testing all homes regardless of radon zone. County radon zones cannot replace an in-home radon test.
Top Contaminants
| Contaminant | Category | Violations | ZIPs Affected |
|---|---|---|---|
| Public Notice Rule | Reporting | 35 | 2 |
| Lead and Copper Rule Revisions | Treatment Technique | 23 | 2 |
| Consumer Confidence Rule | Reporting | 19 | 2 |
| Lead and Copper Rule | Treatment Technique | 17 | 2 |
| Revised Total Coliform Rule | Microbiological | 15 | 2 |
Areas with Most Violations
| ZIP Code | Safety Score | Violations | Health-Based | System |
|---|---|---|---|---|
| 77375 | B | 82 | 6 | City of Tomball |
| 77377 | B | 21 | 4 | Northwest Harris County Municipal Utility District 5 |
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
Reporting periods vary by source. Missing data is shown as unavailable, not as zero.
Health Outcomes in Tomball
Source: CDC PLACES (County-level estimates). County health indicators are shown for context only and are not linked to this area's water records.
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
Whether your home in Tomball was built before or after 1986 matters more than the citywide median of 2005, because the 1986 federal lead restrictions cover plumbing installed after that point.
Most homes in Tomball were built after 1986; lead exposure at a tap still depends on its service line and plumbing. Older homes should still be tested.
Source: U.S. Census Bureau ACS B25034.
Cost Context: What Remediation Means for Tomball Homeowners
Of the three cost-context tiers - low, moderate and elevated - Tomball is in the low one.
Estimated remediation costs in Tomball can be compared with local home values. The $600–$2,300 estimated range can be set against the median property value; actual costs vary by home. Home values are 54% above the Texas average.
Lead Exposure Risk for Children in Tomball
Why children are most at risk: The CDC states that no safe blood lead level in children has been identified. Children under 6 absorb lead more readily than adults, and even low levels can cause developmental delays, learning difficulties, and behavioral problems.
Averaged across Tomball ZIP codes, the 90th-percentile lead results reported by water systems come to less than 10 parts per billion. That is an area summary rather than a reading from any home, and EPA's health goal for lead in drinking water is zero; about 17% of local housing predates 1986.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
Historical NFIP Claim Context in Tomball
Historical NFIP data for Tomball contains 1,048 flood insurance claims. Among claims with payment data, the average reported building, contents, and ICC component sum is $74,148. Among ZIP codes with claim records, 0% have an A- or V-family dominant rated zone recorded in those historical claims. This is not a complete current FEMA property-map inventory.
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. The $1,100 remediation estimate shown here excludes flood insurance and is not derived from NFIP claim count.
Claim count does not establish current property risk. Check the exact address in FEMA's current map and obtain a property-specific insurance quote when relevant.
Source: historical FEMA National Flood Insurance Program (NFIP) claim records. No current FEMA property-map designation is asserted.
Deep Dive Reports
Detailed analysis for Tomball, TX