Community Water System · PWS TX0290065
Port Oconnor Improvement District
Operator location Port O Connor, Texas - 27% of 56 violations are health-based (upper-third health share (> 23%)); groundwater source; 1,568 served per SDWIS.
- 1,568
- People served (this PWS)
- 56
- EPA violations (this PWS)
- 15
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Port Oconnor Improvement District standing, mid SDWIS violation third
27% of 56 recorded violations are health-based - upper-third health share (> 23%). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 27% is upper-third health share (> 23%). Population rank #15,538 of 29,740 among systems serving 500+.
The verdict
Port Oconnor Improvement District lands in the middle third by violation volume (56), large enough for peer comparisons without matching the fleet's heaviest ledgers. Population served is mid-pack at 1,568 (mid served population (≤ 3,309)). Health-based share is 27% - most of this ledger is MCL or treatment-technique exceedance. No UCMR5 PFAS test appears for this system in this extract.
- #15,538 of 29,740
- Population · /systems
- #1,895 of 3,040
- Population · TX
- 56
- Total EPA violations on record
- 27%
- Health-based (MCL / treatment failure)
Population ordinals match the sitemap cohort (systems serving 500+, population_served DESC). See methodology · corpus placement.
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 2,061
- County
- Calhoun
- School/Daycare
- No
- MCL Violations
- 15
- Monitoring Violations
- 35
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Chlorine | MR | 16 | 2021 |
| TTHM | MCL | 12 | 2024 |
| Coliform (TCR) | MR | 8 | 2010 |
| Lead and Copper Rule | MR | 7 | 2019 |
| Public Notice | Other | 5 | 2019 |
| Revised Total Coliform Rule | MON | 4 | 2018 |
| Coliform (TCR) | MCL | 3 | 2006 |
Violation Count vs. the National Corpus
Port Oconnor Improvement District has 56 recorded EPA violations, 60% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 40% carry more. 27% of this system's own violations are health-based (15 of 56), and it ranks #15,538 of 29,740 by population served among that same cohort.
EPA violations vs. the national water-system corpus
Public water systems serving 500+ people (EPA SDWIS)
56 Around the middle fewer violations than 40% of 29,740 water systems
the national water-system corpus, bucketed by value
Each bar is a band; taller bars hold more water systems. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.
Source EPA SDWIS · 2026-05-15
Health-based violations on Port Oconnor Improvement District
15 health-based rows in the tables above map to MCL or treatment-technique exceedances, verify each contaminant code on the federal SDWIS report for TX0290065.
Sources: EPA SDWIS · Texas Commission on Environmental Quality (TCEQ) - Drinking Water Watch
Nationwide peers
56 violations · 1,568 served: nearest cross-state SDWIS matches.
Cross-state systems near this violation count
Nearest cross-state community systems (500+ served) by total SDWIS violations on record.
Cross-state systems near this population served
Nearest cross-state systems by EPA SDWIS population_served (same 500+ sitemap gate).
What to do with Port Oconnor Improvement District
Use this system's EPA-reported record as a starting filter, not a final verdict.
- See how every tracked system in Texas compares on the same EPA violation measures. Texas systems
- Check whether PFAS was detected at this system under UCMR5 testing. PFAS guide
- Find and compare another public water system by name or PWSID. Search systems
EPA SDWIS and UCMR5 figures are informational only, not a substitute for a certified lab test of your own tap water.