El Oso Water Supply Corporation

ZipCheckup's reading of EPA SDWIS for El Oso Water Supply Corporation (TX1280007): 2 past health-based violations, since resolved. The five-year EPA compliance file for El Oso Water Supply Corporation contains 3 violations, each documented and subsequently closed - the utility now operates in full compliance and continues to supply approximately 6,288 residents with water meeting current federal standards, including both health-based and monitoring requirements.

Data: EPA SDWIS

System Overview

El Oso Water Supply Corporation (EPA ID: TX1280007) is a community water system in Texas that serves approximately 6,288 people from groundwater sources.

This system provides water to 10 ZIP codes across 10 communities.

ZIP-Area Home Safety Context: A (94/100)

This is the average Home Safety Score for 3 of 10 service-area ZIP codes with all required score domains observed. It is not a grade for the water utility.

Model 4.0.0 uses SDWIS identity plus accepted ECHO SDWA lifecycle-based water compliance, the UCMR 5 PFAS MCL screen, EPA radon zone, and annual EPA AirData AQI across three equally weighted domains. Missing required evidence suppresses the score.

Violation History

Status breakdown for accepted records with record years 2021-2026: 3 resolved, 0 archived, 0 addressed, and 0 unaddressed. Under this source contract, current noncompliance is the sum of addressed and unaddressed records. Archived and resolved records are excluded from current noncompliance.

Recent Violations

Contaminants Detected

The following contaminants have been flagged in EPA records for this water system:

Health Risk Details

Haloacetic Acids (HAA5) (EPA limit: 0.06 mg/L)

Cancer risk; reproductive & developmental effects At-risk groups: pregnant women, infants, long-term consumers of chlorinated municipal water.

Removal methods: granular activated carbon (GAC), carbon block filter, reverse osmosis. Find the right filter →

Lead & Copper

EPA Lead and Copper Rule evidence attributed directly to this water system:

No copper action-level exceedance record appears for this PWSID in the accepted LCR snapshot. This does not establish a clean copper measurement.

Radon Risk in Service Area

Dominant radon zone for ZIP codes served by this system: Zone 3 (Low Risk)

ZIP Codes Served

Coverage: Service area ZIP codes sourced from EPA Community Water System Service Area Boundaries v3 (March 2026 release). These ZIPs reflect the actual deployment footprint recorded by TX or modeled from parcel and building-footprint data.

• 78071 - Three Rivers
• 78075 - Whitsett
• 78102 - Beeville
• 78113 - Falls City
• 78116 - Gillett
• 78117 - Hobson
• 78118 - Karnes City
• 78119 - Kenedy
• 78146 - Pettus
• 78151 - Runge

Data Sources

This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for El Oso Water Supply Corporation (TX1280007) on EPA.gov.

Frequently Asked Questions

Is El Oso Water Supply Corporation water safe to drink?

The accepted 2026Q2 ECHO snapshot shows no current noncompliance for El Oso Water Supply Corporation; its 3 accepted 2021-2026 records are resolved or archived. Historical compliance status does not establish conditions at a specific tap.

How many people does El Oso Water Supply Corporation serve?

El Oso Water Supply Corporation serves approximately 6,288 people across 10 ZIP codes in Texas.

Where does El Oso Water Supply Corporation get its water?

The primary water source is groundwater.

@misc{zipcheckup-water-system-tx1280007,
  author = {{ZipCheckup}},
  title  = {{El Oso Water Supply Corporation (TX): 2 Health Violations}},
  year   = {n.d.},
  url    = {https://zipcheckup.com/water-system/tx1280007/}
}