Community Water System · PWS TX1610027
Selkirk WSC
Operator location Lake Jackson, Texas - smaller served population (≤ 999) at 678 people served; 395 SDWIS violations on record from groundwater sources.
- 678
- People served (this PWS)
- 395
- EPA violations (this PWS)
- 21
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Selkirk WSC standing, high SDWIS violation third
678 people served (SDWIS) - smaller served population (≤ 999). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 5% is middle-third health share (≤ 23%). Population rank #24,770 of 29,740 among systems serving 500+.
The verdict
Selkirk WSC sits in the upper third of the sitemap cohort by violation count (395), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is smaller (678; smaller served population (≤ 999)), so each violation row represents a compact service footprint. Health-based share is 5% (middle-third health share (≤ 23%)). No UCMR5 PFAS test appears for this system in this extract.
- #24,770 of 29,740
- Population · /systems
- #2,705 of 3,040
- Population · TX
- 395
- Total EPA violations on record
- 5%
- 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
- 226
- County
- Matagorda
- School/Daycare
- No
- MCL Violations
- 18
- Monitoring Violations
- 336
- Treatment Tech Violations
- 3
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Arsenic | MCL | 18 | 2012 |
| Consumer Confidence Rule | Other | 12 | 2009 |
| Endrin | MR | 9 | 2021 |
| Toxaphene | MR | 9 | 2021 |
| Di(2-ethylhexyl) adipate | MR | 9 | 2021 |
| Atrazine | MR | 9 | 2021 |
| Heptachlor epoxide | MR | 9 | 2021 |
| HEXACHLOROBENZENE | MR | 9 | 2021 |
| Benzo(a)pyrene | MR | 9 | 2021 |
| Chlordane | MR | 9 | 2021 |
| BHC-GAMMA | MR | 9 | 2021 |
| Methoxychlor | MR | 9 | 2021 |
| Di(2-ethylhexyl) phthalate | MR | 9 | 2021 |
| LASSO | MR | 9 | 2021 |
| Heptachlor | MR | 9 | 2021 |
| Simazine | MR | 9 | 2021 |
| Hexachlorocyclopentadiene | MR | 9 | 2021 |
| Pentachlorophenol | MR | 9 | 2021 |
| Nitrite | MR | 8 | 2019 |
| Nitrate | MR | 8 | 2019 |
| cis-1,2-Dichloroethylene | MR | 8 | 2019 |
| DICHLOROMETHANE | MR | 8 | 2019 |
| o-Dichlorobenzene | MR | 8 | 2019 |
| Vinyl chloride | MR | 8 | 2019 |
| 1,1-Dichloroethylene | MR | 8 | 2019 |
| trans-1,2-Dichloroethylene | MR | 8 | 2019 |
| 1,2-Dichloroethane | MR | 8 | 2019 |
| Carbon tetrachloride | MR | 8 | 2019 |
| 1,2-Dichloropropane | MR | 8 | 2019 |
| 1,1,2-Trichloroethane | MR | 8 | 2019 |
Violation Count vs. the National Corpus
Selkirk WSC has 395 recorded EPA violations, 94% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 6% carry more. 5% of this system's own violations are health-based (21 of 395), and it ranks #24,770 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)
395 Higher than most more violations than 94% 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
Population served record for Selkirk WSC
EPA SDWIS lists 678 people served and 226 connections for this PWS, confirm the service-area footprint on the federal report before comparing to municipal census totals.
Sources: EPA SDWIS · Texas Commission on Environmental Quality (TCEQ) - Drinking Water Watch
Nationwide peers
395 violations · 678 served: nearest cross-state SDWIS matches.
Cross-state systems with comparable violation load
Nearest cross-state community systems (500+ served) by total SDWIS violations on record.
Cross-state systems with smaller service footprints
Nearest cross-state systems by EPA SDWIS population_served (same 500+ sitemap gate).
What to do with Selkirk WSC
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.