Community Water System · PWS TX0940085
Oak Hills Ranch Water
Operator location Des Peres, Texas - 0% of 1,050 violations are health-based (lower-third health share (≤ 1%)); groundwater source; 624 served per SDWIS.
- 624
- People served (this PWS)
- 1,050
- EPA violations (this PWS)
- 4
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Oak Hills Ranch Water standing, high SDWIS violation third
0% of 1,050 recorded violations are health-based - lower-third health share (≤ 1%). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 0% is lower-third health share (≤ 1%). Population rank #25,726 of 29,740 among systems serving 500+.
The verdict
Oak Hills Ranch Water sits in the upper third of the sitemap cohort by violation count (1,050), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is smaller (624; smaller served population (≤ 999)), so each violation row represents a compact service footprint. Health-based share is only 0% - almost all of this trail is monitoring or reporting. No UCMR5 PFAS test appears for this system in this extract.
- #25,726 of 29,740
- Population · /systems
- #2,799 of 3,040
- Population · TX
- 1,050
- Total EPA violations on record
- 0%
- 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
- 208
- County
- Guadalupe
- School/Daycare
- No
- MCL Violations
- 0
- Monitoring Violations
- 893
- Treatment Tech Violations
- 4
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Chlorine | MR | 130 | 2020 |
| Public Notice | Other | 79 | 2024 |
| Consumer Confidence Rule | Other | 69 | 2024 |
| Lead and Copper Rule | MR | 48 | 2025 |
| Nitrate | MR | 25 | 2020 |
| 1,2,4-Trichlorobenzene | MR | 24 | 2020 |
| cis-1,2-Dichloroethylene | MR | 24 | 2020 |
| Xylenes, Total | MR | 24 | 2020 |
| DICHLOROMETHANE | MR | 24 | 2020 |
| Vinyl chloride | MR | 24 | 2020 |
| trans-1,2-Dichloroethylene | MR | 24 | 2020 |
| 1,1,1-Trichloroethane | MR | 24 | 2020 |
| Carbon tetrachloride | MR | 24 | 2020 |
| 1,2-Dichloropropane | MR | 24 | 2020 |
| 1,1,2-Trichloroethane | MR | 24 | 2020 |
| CHLOROBENZENE | MR | 24 | 2020 |
| p-Dichlorobenzene | MR | 24 | 2020 |
| Trichloroethylene | MR | 24 | 2020 |
| Ethylbenzene | MR | 24 | 2020 |
| Styrene | MR | 24 | 2020 |
| o-Dichlorobenzene | MR | 24 | 2020 |
| 1,1-Dichloroethylene | MR | 24 | 2020 |
| 1,2-Dichloroethane | MR | 24 | 2020 |
| Tetrachloroethylene | MR | 24 | 2020 |
| Benzene | MR | 24 | 2020 |
| Toluene | MR | 24 | 2020 |
| Nitrite | MR | 10 | 2019 |
| Total Haloacetic Acids (HAA5) | MR | 10 | 2019 |
| E. COLI | MR | 10 | 2020 |
| TTHM | MR | 10 | 2019 |
Violation Count vs. the National Corpus
Oak Hills Ranch Water has 1,050 recorded EPA violations, 99% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 1% carry more. 0% of this system's own violations are health-based (4 of 1,050), and it ranks #25,726 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)
1,050 Higher than most more violations than 99% 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 Oak Hills Ranch Water
4 health-based rows in the tables above map to MCL or treatment-technique exceedances, verify each contaminant code on the federal SDWIS report for TX0940085.
Sources: EPA SDWIS · Texas Commission on Environmental Quality (TCEQ) - Drinking Water Watch
Nationwide peers
1,050 violations · 624 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 Oak Hills Ranch Water
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.