Community Water System · PWS TX1010100
Mary Francis Subdivision
Operator location Austin, Texas - 73% of 122 violations are health-based (upper-third health share (> 23%)); groundwater source; 1,785 served per SDWIS.
- 1,785
- People served (this PWS)
- 122
- EPA violations (this PWS)
- 89
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Mary Francis Subdivision standing, high SDWIS violation third
73% of 122 recorded violations are health-based - upper-third health share (> 23%). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 73% is upper-third health share (> 23%). Population rank #14,558 of 29,740 among systems serving 500+.
The verdict
Mary Francis Subdivision sits in the upper third of the sitemap cohort by violation count (122), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is mid-pack at 1,785 (mid served population (≤ 3,309)). Health-based share is 73% - most of this ledger is MCL or treatment-technique exceedance. No UCMR5 PFAS test appears for this system in this extract.
- #14,558 of 29,740
- Population · /systems
- #1,781 of 3,040
- Population · TX
- 122
- Total EPA violations on record
- 73%
- 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
- Private
- Connections
- 595
- County
- Harris
- School/Daycare
- No
- MCL Violations
- 89
- Monitoring Violations
- 10
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Combined Radium (-226 and -228) | MCL | 44 | 2008 |
| Gross Alpha, Excl. Radon and U | MCL | 41 | 2008 |
| Coliform (TCR) | MR | 10 | 2014 |
| Coliform (TCR) | MCL | 4 | 1991 |
Violation Count vs. the National Corpus
Mary Francis Subdivision has 122 recorded EPA violations, 77% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 23% carry more. 73% of this system's own violations are health-based (89 of 122), and it ranks #14,558 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)
122 Higher than most more violations than 77% 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 Mary Francis Subdivision
89 health-based rows in the tables above map to MCL or treatment-technique exceedances, verify each contaminant code on the federal SDWIS report for TX1010100.
Sources: EPA SDWIS · Texas Commission on Environmental Quality (TCEQ) - Drinking Water Watch
Nationwide peers
122 violations · 1,785 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 near this population served
Nearest cross-state systems by EPA SDWIS population_served (same 500+ sitemap gate).
What to do with Mary Francis Subdivision
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.