Port Oconnor Improvement District
EPA ID: TX0290065 · 1,568 people served · 3 ZIP codes
Looking at the EPA enforcement file for Port Oconnor Improvement District, 79 violations are listed as unresolved — those findings cover the utility's service area of approximately 1,568 people and remain open in the federal compliance system, awaiting formal corrective action documentation.
Data: EPA SDWIS Last verified: 2026-04-02
Compliance Trajectory
Worsening · Risk tier: High · 95% chance of violation in next 12 months
Violations went from 3 (2022) to 16 (2025). The pattern suggests growing compliance challenges.
Service Area Map
Coverage area for Port Oconnor Improvement District Source: EPA SDWIS service area boundaries.
Service area boundary — Grade B
Service Area Demographics
The Port Oconnor Improvement District serves a community with a median household income of $81,917 and an estimated 19,584 residents across its service area. Approximately 55% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
Environmental Justice Note: 60% of the population in this service area is classified as disadvantaged under EPA's EJScreen criteria. Communities with higher disadvantaged populations often face disproportionate environmental and health burdens, including aging water infrastructure and limited resources for remediation.
💧 Where Does Your Water Come From?
Port Oconnor Improvement District's water is pumped from underground aquifers. Groundwater is naturally filtered through rock and soil, but it can be vulnerable to PFAS contamination, nitrates from agriculture, and industrial chemicals that seep into the water table.
About 6% of homes in Calhoun County, Texas rely on private wells rather than public water systems. Private well owners are responsible for their own water testing and treatment.
Wastewater Proximity Note: This service area ranks in the 60th percentile nationally for proximity to wastewater discharge points.
Superfund Proximity Note: This service area ranks in the 70th percentile nationally for proximity to Superfund (NPL) sites. Groundwater sources near contaminated sites may face elevated risk from industrial chemicals.
Infrastructure Risk
Detected Contaminants
How Port Oconnor Improvement District compares to EPA limits
What This Means For You
Haloacetic Acids (HAA5) at 27 mg/L exceeds the EPA maximum of 0.06 mg/L. Cancer risk; reproductive & developmental effects. Consider granular activated carbon (GAC) filtration.
Contaminant 2110 at 1 mg/L exceeds the EPA maximum of 0.005 mg/L. Leukemia & blood cancers (known carcinogen). Consider granular activated carbon (GAC) filtration.
Consumer Confidence Report Rule at 47 mg/L exceeds the EPA maximum of mg/L.
Lead and Copper Rule at 45 mg/L exceeds the EPA maximum of mg/L.
Total Trihalomethanes (TTHM) at 1 mg/L exceeds the EPA maximum of 0.08 mg/L. Bladder & rectal cancer risk; reproductive concerns. Consider granular activated carbon (GAC) filtration.
PFAS Detected in Service Area
PFAS ("forever chemicals") have been detected in water serving this system's area. 8 detections recorded. 2 exceed federal EPA limits (4 ppt for PFOA/PFOS).
Haloacetic Acids (HAA5) was detected in this water system. granular activated carbon (GAC) filtration can reduce exposure.
Find a certified water filter →Comparable Water Systems
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Estimated Remediation Costs
Average estimated costs across ZIP codes served by this system
Based on national averages for common remediation projects. Actual costs vary by property. Only issues flagged by EPA, FEMA, or state data for each ZIP code are included.
System Overview
Port Oconnor Improvement District (EPA ID: TX0290065) is a community water system in Texas that serves approximately 1,568 people from groundwater sources.
This system provides water to 3 ZIP codes across 3 communities.
Average Home Safety Score: B (70/100)
Based on water quality violations, lead levels, and radon risk across all ZIP codes served by this system.
Violation History
Recent Violations
| Date | Contaminant | Type | Status |
|---|---|---|---|
| September 1, 2025 | Consumer Confidence Report Rule | Monitoring | Unresolved |
| August 1, 2025 | Consumer Confidence Report Rule | Monitoring | Unresolved |
| July 1, 2025 | Stage 1 DBP Rule | Monitoring | Unresolved |
| July 1, 2025 | Consumer Confidence Report Rule | Monitoring | Unresolved |
| July 1, 2025 | Haloacetic Acids (HAA5) | Health-based | Unresolved |
| June 1, 2025 | Consumer Confidence Report Rule | Monitoring | Unresolved |
| May 20, 2025 | Lead and Copper Rule | Monitoring | Unresolved |
| May 13, 2025 | Haloacetic Acids (HAA5) | Monitoring | Unresolved |
| May 1, 2025 | Lead and Copper Rule | Monitoring | Unresolved |
| May 1, 2025 | Consumer Confidence Report Rule | Monitoring | Unresolved |
| April 28, 2025 | Lead and Copper Rule | Monitoring | Unresolved |
| April 27, 2025 | Lead and Copper Rule | Monitoring | Resolved |
| April 1, 2025 | Consumer Confidence Report Rule | Monitoring | Unresolved |
| April 1, 2025 | Haloacetic Acids (HAA5) | Health-based | Unresolved |
| April 1, 2025 | Revised Total Coliform Rule | Monitoring | Unresolved |
| March 6, 2025 | Lead and Copper Rule | Monitoring | Resolved |
| March 1, 2025 | Consumer Confidence Report Rule | Monitoring | Unresolved |
| February 1, 2025 | Consumer Confidence Report Rule | Monitoring | Unresolved |
| January 1, 2025 | Stage 1 DBP Rule | Monitoring | Unresolved |
| December 30, 2024 | Stage 1 DBP Rule | Monitoring | Resolved |
Contaminants Detected
The following contaminants have been flagged in EPA records for this water system:
| Contaminant | Category | Violations | Health-Based |
|---|---|---|---|
| Consumer Confidence Report Rule | Reporting Failure | 47 | No |
| Lead and Copper Rule | Treatment Failure | 45 | No |
| Haloacetic Acids (HAA5) | Disinfection Byproducts | 27 | Yes |
| Revised Total Coliform Rule | Microbiological | 12 | No |
| Stage 1 DBP Rule | Treatment Failure | 10 | No |
| Total Organic Carbon | Disinfection Byproducts | 3 | No |
| Surface Water Treatment Rule | Treatment Failure | 3 | No |
| Stage 2 DBP Rule | Treatment Failure | 2 | Yes |
| Contaminant 2110 | Other Violation | 1 | No |
| Total Trihalomethanes (TTHM) | Disinfection Byproducts | 1 | No |
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 sampling data for ZIP codes served by this system:
Radon Risk in Service Area
Dominant radon zone for ZIP codes served by this system: Zone 3 (Low Risk)
Need help with your water quality?
Typical cost: Water test: typically $20–$50 (DIY kit) · Professional inspection: $150–$400
Find the Right Water FilterFree tip: Let cold water run for 2 minutes before drinking — this helps flush lead from your pipes.
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.
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for Port Oconnor Improvement District (TX0290065) on EPA.gov.
Frequently Asked Questions
Is Port Oconnor Improvement District water safe to drink?
Port Oconnor Improvement District has recorded 16 health-based violations in the past 5 years. While the system is required to treat water to meet federal standards, you may want to consider additional precautions such as a certified water filter.
How many people does Port Oconnor Improvement District serve?
Port Oconnor Improvement District serves approximately 1,568 people across 3 ZIP codes in Texas.
Where does Port Oconnor Improvement District get its water?
The primary water source is groundwater.
Lead Service Line Inventory
Service line breakdown reported under the federal Lead and Copper Rule Improvements (LCRI) inventory requirement:
This system reports zero confirmed lead service lines in its inventory. Unknown-material counts may still warrant verification.
Federal LCRI rule (effective October 2024) requires every public water system to inventory its service lines and complete lead-line replacement within 10 years.
Source: EPA SDWIS Federal Service Line Inventory (Phase 2) · Submitted 2026
ZipCheckup is not affiliated with the utility or state agency. Inventory figures render verbatim from the public LCRI submission cited above; ZipCheckup does not perform inspections or replacements.
Frequently Asked Questions
What You Can Do
Test your water
Home test kits can detect lead, bacteria, and other contaminants at your tap. Find the right filter →
Check your specific ZIP code
Water quality can vary within a system. View nearest ZIP report →
Contact your utility
Port Oconnor Improvement District (EPA ID: TX0290065) — request the latest Consumer Confidence Report or ask about specific contaminants.