Missouri City, TX: 6 Violations — 74/100 (2026)
2 ZIP codes · 9 water systems · Updated 2026-06-03
Looking at federal monitoring data for Missouri City, TX: the city clears benchmarks set under the Safe Drinking Water Act with room to spare — recorded exceedances are rare, and the systems serving local households have not triggered any pattern of repeat deficiencies in recent cycles.
How Missouri City Compares
Data: EPA SDWIS Last verified: 2026-06-03
What You Should Know About Missouri City Water
- Your city's water systems recorded 6 violations in the past 5 years.
- Average lead level: 0.0005 mg/L.
- Homes built before 1986: 38% — older plumbing may contain lead solder.
- Estimated remediation: $1,700 per household.
- CDC health risk index: 10.52.
Who Supplies Your Water in Missouri City
Residential addresses in Missouri City, TX are served by 3 primary water providers out of 9 systems in federal records. Each system maintains separate infrastructure and files its own EPA compliance reports, so service conditions are not uniform across the city.
Overview
We track water quality and home safety data for 2 ZIP codes in Missouri City, Texas (population ~120,305), covering 9 community water systems serving approximately 3,178,876 people region-wide.
2 of 2 ZIP codes (100%) have recorded EPA violations. All violations are monitoring/reporting type.
Home Safety Score
Average Home Safety Score for Missouri City: B (74/100)
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
Missouri City water systems draw from: Groundwater, Surface water.
Lead & Copper
- Average lead level (90th percentile): 0.0005 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 |
|---|---|---|---|
| Contaminant 2110 | Other | 3 | 2 |
| Contaminant 2959 | Other | 3 | 2 |
| Total Organic Carbon | Disinfection Byproducts | 3 | 2 |
Areas with Most Violations
| ZIP Code | Safety Score | Violations | Health-Based | System |
|---|---|---|---|---|
| 77459 | B | 3 | 0 | Quail Valley Utility District |
| 77489 | B | 3 | 0 | Quail Valley Utility District |
All ZIP Codes in Missouri City
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 Missouri City
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 Missouri City Water
Based on EPA violation records. Check your ZIP code report for system-specific contaminant data.
Housing & Infrastructure in Missouri City
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
Tap water lead levels are shaped by two factors: what the utility delivers, and what the household plumbing adds to it. Older homes contribute disproportionately to that second variable because lead solder was standard in copper plumbing before 1986, and lead pipes were common before 1970. In Missouri City, where the median build year is 1996, a substantial share of the housing stock falls into these older categories. The bar chart above breaks out the pre-1970, 1970-to-1986, and post-1986 segments — the key ages for understanding where plumbing-era risk concentrates across the city.
Most homes in Missouri City 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 Missouri City Homeowners
When estimated remediation is placed alongside median property values in Missouri City, the resulting ratio is low — a finding consistent with a household financial perspective where documented issues can be addressed without a meaningful impact on overall equity position, making this market one of the more favorable contexts for remediation planning.
Remediation costs in Missouri City are relatively low compared to home values. The $1,100–$2,600 estimated range is a small fraction of median property value. Home values are 61% above the Texas average.
Lead Exposure Risk for Children in Missouri City
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.
Pulling a tap sample fills the gap that utility data cannot close, particularly here where 38% of housing dates from the pre-rule era and citywide monitoring sits at or above the regulatory mark in Missouri City.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
Flood & Climate Risk in Missouri City
Across the multi-decade NFIP program, Missouri City has logged 1339 filed flood claims — a tally that corresponds with 100% of local ZIP codes carrying FEMA flood zone designations. For water quality, the implications extend beyond property damage: when flooding reaches the magnitude this area's record implies, water supply systems face compounding stress. Treatment plants handling contaminated floodwater intake face sharply elevated contaminant loads. Private wells in low-lying FEMA zones are vulnerable to surface infiltration during each major event. Distribution networks can experience pressure-inversion backflow, drawing untreated water back into the supply. These are not remote possibilities at this exposure level.
Missouri City has a significant flood history with 1,339 FEMA flood insurance claims on record, averaging $10,506 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>$1,700</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 Missouri City, TX