Rio Vista, TX: 1 Health Violation — 86/100 (2026)
1 ZIP code · 4 water systems · Updated 2026-06-03
Across Rio Vista, EPA monitoring data shows low violation rates and healthy safety margins — a pattern that places the city well above TX's average for drinking water compliance across recent reporting cycles.
How Rio Vista Compares
Data: EPA SDWIS Last verified: 2026-06-03
Rio Vista Water: The Quick Version
- Your city's water systems recorded 16 violations in the past 5 years.
- Homes built before 1986: 35% — older plumbing may contain lead solder.
- Estimated remediation: $3,300 per household.
- CDC health risk index: 12.4 — above typical levels.
Water Systems Serving Rio Vista
At present, 3 utilities serve the bulk of Rio Vista, TX's residential water connections out of 4 systems active in the area, spread across independent providers with separate infrastructure and compliance obligations.
Overview
We track water quality and home safety data for 1 ZIP code in Rio Vista, Texas (population ~4,193), covering 4 community water systems serving approximately 103,932 people region-wide.
1 of 1 ZIP code (100%) have recorded EPA violations. 1 health-based violation documented.
Home Safety Score
Average Home Safety Score for Rio Vista: A (86/100)
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
Rio Vista water systems draw from: Groundwater.
Lead & Copper
- Lead data: not yet available for Rio Vista
- 0 ZIP codes exceed the EPA lead action level
Radon Risk
Dominant radon zone: Zone 3 (Low Risk)
Top Contaminants
| Contaminant | Category | Violations | ZIPs Affected |
|---|---|---|---|
| Consumer Confidence Report Rule | Reporting | 12 | 1 |
| Lead and Copper Rule | Treatment Technique | 8 | 1 |
| Surface Water Treatment Rule | Treatment Technique | 6 | 1 |
| Stage 2 DBP Rule | Treatment Technique | 4 | 1 |
| Revised Total Coliform Rule | Microbiological | 2 | 1 |
Areas with Most Violations
| ZIP Code | Safety Score | Violations | Health-Based | System |
|---|---|---|---|---|
| 76093 | A | 16 | 1 | City of Rio Vista |
All ZIP Codes in Rio Vista
- 76093 [A] — 16 violations ⚠
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.
CDC Health Data for Rio Vista
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
Key Contaminants Detected in Rio Vista
Based on EPA violation records. Check your ZIP code report for system-specific contaminant data.
How Old Is Rio Vista's Housing Stock?
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
The story of Rio Vista's housing stock is one of layered development — neighborhoods built in different decades, each carrying the plumbing standards of their era. The median build year of 1994 reflects that layered character. Before 1986, lead solder was standard in copper plumbing; before 1970, lead pipes were commonly used for service lines. A substantial portion of the pre-1986 homes visible in the distribution above still carry the plumbing materials of those earlier standards — creating a risk environment that the city-wide aggregate water data doesn't fully capture.
Most homes in Rio Vista 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.
Rio Vista: Remediation Cost in Perspective
When the numbers for Rio Vista are taken together, the remediation share is clearly in the elevated category — most homeowners here are weighing a commitment that extends beyond routine property upkeep, and the practical value of documenting scope early, prioritizing by urgency, and mapping costs against the household budget is proportionally higher at this tier.
At 2.7% of home value, remediation costs in Rio Vista represent a significant financial burden. For homes valued near the median, fixing water and safety issues could cost $2,250–$5,400. Home values here are 46% below the Texas average.
Protecting Children from Lead in Rio Vista
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.
Older stock in Rio Vista represents 35% of the inventory, and citywide monitoring runs at or above the federal action level — making an in-home read a standard household-level step.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
Climate-Related Water Risk for Rio Vista
The National Flood Insurance Program captures decades of claims at the local level, building a record of cumulative community flood exposure. For Rio Vista, that record documents 6 claims and 100% of ZIP codes inside FEMA-designated flood zones. What makes those numbers relevant to water quality is the set of mechanisms flooding activates: heavy precipitation that floods treatment intake zones can introduce contaminants upstream of normal filtration; well casings in low-lying areas can be infiltrated by floodwaters carrying bacteria, sediment, and chemical residue; and distribution system pressure changes during flooding can create backflow conditions. These effects become more probable as flood frequency and magnitude increase — and the NFIP record indicates both are meaningful factors locally.
Rio Vista has a moderate flood history with 6 FEMA claims averaging $59,807 per payout. 100% of ZIP codes fall within FEMA flood zones. Flood events can contaminate drinking water and overwhelm treatment systems.
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>$3,300</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 Rio Vista, TX