CITY REPORT TX HEALTH VIOLATIONS: 1

Rio Vista, TX: 1 Health Violation - Home Safety 90/100

1 ZIP code · 5 water systems · Updated

ZipCheckup grade for Rio Vista: A.

Checked records flag no major concern; missing data is unknown.

Within Rio Vista, TX, the available records add up to an upper-tier grade; that grade describes records, not the water at a given faucet.

How Rio Vista Compares

Rio Vista90/100
Texas avg83/100
National avg73/100

Data: EPA SDWIS

1
ZIP Codes
5
Water Systems
1
ZIPs Linked to Systems with Violations
A · 90
Avg Safety Score
Zone 3
County Radon Potential (Low)
$123K
Median Home Value
$800
Est. Remediation (0.7% of home value)

Rio Vista Water: The Quick Version

  • Your city's water systems recorded 36 violations since 2021.
  • Average of reported 90th-percentile lead results: 0.0027 mg/L.
  • Homes built before 1986: 35% - older plumbing may contain lead solder.
  • Estimated remediation: $800 per household.
  • Health risk index (ZipCheckup composite of CDC data): 12.4.

Water Systems Serving Rio Vista

Counting every public water system linked to Rio Vista, TX in federal data gives 5. The list below keeps the 3 largest by reported population served, a figure that covers each system's whole service area rather than the city alone. A household's own supplier is named on its water bill.

Overview

We track home safety data for 1 ZIP code in Rio Vista, Texas (population ~4,193), covering 5 community water systems serving approximately 104,235 people region-wide. The EPA snapshots used for this build directly map water systems to 1 of 1 ZIP codes.

1 of 1 ZIP code with a reported violation count in the available EPA record (100%) have recorded EPA violations. 1 health-based violation appear in the available health breakdown.

Home Safety Score

Average Home Safety Score for Rio Vista: A (90/100)

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

Rio Vista water systems draw from: Groundwater, Surface water.

Lead & Copper

  • Average of reported 90th-percentile lead results: 0.0027 mg/L (EPA action level: 0.015 mg/L)
  • 0 of 1 ZIP code with known status exceed the EPA lead action level

Radon Risk

1 of 1 ZIP records with known zones is 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
Revised Total Coliform Rule Microbiological 14 1
Public Notice Rule Reporting 12 1
Consumer Confidence Rule Reporting 8 1
Lead and Copper Rule Revisions Treatment Technique 6 1
Chlorine Disinfectant 4 1

Areas with Most Violations

ZIP Code Safety Score Violations Health-Based System
76093 A 36 1 Johnson County Special Utility District

All ZIP Codes in Rio Vista

  • 76093 [A] - 36 violations ⚠

Data Sources

Reporting periods vary by source. Missing data is shown as unavailable, not as zero.

CDC Health Data for Rio Vista

10.2%
Asthma (US: 9.8%)
11.9%
Diabetes (US: 10.4%)
18%
Poor Mental Health (US: 14.8%)

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

Asthma 10.2% ↑
Diabetes 11.9% ↑
Mental Health 18% ↑

Vertical line = national average. ■ Above national · ■ Below national

Key Contaminants Detected in Rio Vista

Revised Total Coliform Rule 14 violations
Microbiological
Indicates possible bacterial contamination
Public Notice Rule 12 violations
Reporting
Consumer Confidence Rule 8 violations
Reporting

Based on EPA violation records. Check your ZIP code report for system-specific contaminant data.

How Old Is Rio Vista's Housing Stock?

1994
Median Build Year
35%
Built Before 1986
13%
Built Before 1970
Copper
Likely Pipe Material

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

When a home in Rio Vista was built matters for lead because federal rules adopted in 1986 limited how much lead new plumbing could contain; the local median build year is 1994. A median sits in the middle of a range, so some homes are older and some newer, and past repairs may have changed the pipes in either group. A plumber can identify the materials inside a home, and a lab test measures what reaches the tap.

1994
Median Year Built
35%
Pre-1986 (lead solder era; lead paint banned 1978)
13%
Pre-1970 (Lead Pipes Risk)
Pre-1970 (13%) 1970–1986 (22%) Post-1986 (65%)

Most homes in Rio Vista 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.

Rio Vista: Remediation Cost in Perspective

Here the gap between local home values and the estimated repair bill is wide, so the percentage shown below for Rio Vista stays at or under the 1% mark.

Median Home Value
$123,100
Est. Remediation
$800
Remediation as % of home value 0.7%

Estimated remediation costs in Rio Vista can be compared with local home values. The $450–$1,400 estimated range can be set against the median property value; actual costs vary by home. Home values are 46% below the Texas average.

Protecting Children from Lead in Rio Vista

35%
Homes Built Before 1986
0.0027
mg/L average of reported water-system 90th-percentile lead results (the 0.015 action level applies to each system's result, not to this average)

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.

If you have young children or are pregnant, consider testing your home's water - especially if your home was built before 1986.

Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.

Historical Flood-Claim Evidence for Rio Vista

6
Total FEMA Flood Claims
$71,768
Avg Reported Sum With Payment Data
0%
A/V Share of Claim-Record ZIPs

Historical NFIP data for Rio Vista contains 6 flood insurance claims. Among claims with payment data, the average reported building, contents, and ICC component sum is $71,768. 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 $800 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 Rio Vista, TX

Frequently Asked Questions

What does the Home Safety Score mean for Rio Vista, TX?
Rio Vista has an average Home Safety Score of 90/100 (Grade A) under ZipCheckup model 4.0.0, an area-level model that draws on EPA water compliance records, PFAS screening, EPA radon zones, and annual EPA air quality data; see the methodology page for how inputs and coverage are handled. 36 violations appear in EPA records for water systems mapped to these ZIP codes. Check individual ZIP code reports for component details.
How many violations are on record for water systems serving Rio Vista?
EPA records list 36 EPA violations, including 1 health-based violation for Rio Vista water systems. These water-system violations are shown for 1 mapped ZIP code.
Does Rio Vista water have lead?
The average of the reported 90th-percentile lead results across the ZIP codes of Rio Vista is 0.0027 mg/L. The EPA action level of 0.015 mg/L applies to each water system's own 90th percentile, not to this average. EPA's health goal for lead is zero. Lead levels can vary by home - testing is recommended especially in older properties.
How does Rio Vista compare to Texas average?
Rio Vista has an average Home Safety Score of 90/100, which is at or above the Texas state average of 83/100 for the same model series.
How many water systems serve Rio Vista?
Our records map 5 water systems to 1 ZIP code in Rio Vista. The related population figure in our data is approximately 4,193 people; it is not a count of people served citywide.
How much does it cost to fix water issues in Rio Vista?
Estimated remediation cost per household in Rio Vista: $800; modeled range $450 to $1,400. Estimated costs may include filtration, pipe replacement, radon mitigation, or flood protection where applicable.
Home → Cities → Texas → Rio Vista, TX

How to cite this page

APA ZipCheckup. (2026). Rio Vista, TX: 1 Health Violation - Home Safety 90/100. https://zipcheckup.com/cities/tx/rio-vista/
BibTeX 
@misc{zipcheckup-cities-tx-rio-vista,
  author = {{ZipCheckup}},
  title  = {{Rio Vista, TX: 1 Health Violation - Home Safety 90/100}},
  year   = {2026},
  url    = {https://zipcheckup.com/cities/tx/rio-vista/}
}

Page version: October 2026.

Get safety alerts for Rio Vista, Texas

Free updates when EPA data changes for this area. No spam.

Unsubscribe anytime. Privacy Policy.

Share This Page

X Facebook
Violations found - check filter options Free tool - no phone call required.