San Marcos, TX - Home Safety Score unavailable
2 ZIP codes · 5 water systems · Updated
Data: EPA SDWIS
Key Facts for San Marcos Residents
- Your city's water systems recorded 45 violations since 2021.
- Average of reported 90th-percentile lead results: 0.0069 mg/L.
- Estimated remediation: $800 per household.
- Health risk index (ZipCheckup composite of CDC data): 10.83.
San Marcos's Water Providers
Among 5 systems linked to San Marcos, TX, the 3 biggest by population served appear below.
Overview
We track home safety data for 2 ZIP codes in San Marcos, Texas (population ~87,775), covering 5 community water systems serving approximately 154,346 people region-wide. The EPA snapshots used for this build directly map water systems to 1 of 2 ZIP codes.
1 of 1 ZIP code with a reported violation count in the available EPA record (100%) have recorded EPA violations. 21 health-based violations appear in the available health breakdown.
Water Sources
San Marcos water systems draw from: Groundwater, Surface water.
Lead & Copper
- Average of reported 90th-percentile lead results: 0.0069 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
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 |
|---|---|---|---|
| Total Trihalomethanes (TTHM) | Disinfection Byproducts | 42 | 1 |
| Lead and Copper Rule Revisions | Treatment Technique | 8 | 1 |
| Public Notice Rule | Reporting | 8 | 1 |
| Consumer Confidence Rule | Reporting | 6 | 1 |
| Revised Total Coliform Rule | Microbiological | 6 | 1 |
Areas with Most Violations
| ZIP Code | Safety Score | Violations | Health-Based | System |
|---|---|---|---|---|
| 78666 | — | 45 | 21 | City of San Marcos |
All ZIP Codes in San Marcos
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.
San Marcos Community Health Snapshot
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
What's in San Marcos's Water?
Based on EPA violation records. Check your ZIP code report for system-specific contaminant data.
How Remediation Costs Compare in San Marcos
Estimated remediation for San Marcos is a small fraction of median property value - one percent or less - though the ratio does not describe any single household.
Estimated remediation costs in San Marcos can be compared with local home values. The $450–$1,550 estimated range can be set against the median property value; actual costs vary by home. Home values are 19% above the Texas average.
San Marcos: Lead Risk & Vulnerable Populations
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.
Available area-level lead records for San Marcos do not determine the lead level at an individual tap. Testing is the only way to confirm your water's lead content.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
San Marcos: NFIP Claim Records and Water-Quality Context
Historical NFIP data for San Marcos contains 869 flood insurance claims. Among claims with payment data, the average reported building, contents, and ICC component sum is $39,361. Among ZIP codes with claim records, 100% 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 San Marcos, TX