Community Water System · PWS TX1012392
Harris County MUD 239
Operator location Houston, Texas - larger served population (> 3,309) at 5,583 people served; 9 SDWIS violations on record from groundwater sources.
- 5,583
- People served (this PWS)
- 9
- EPA violations (this PWS)
- 2
- Health-based (this PWS)
- No PFAS
- UCMR5 (this PWS)
Harris County MUD 239 standing, low SDWIS violation third
5,583 people served (SDWIS) - larger served population (> 3,309). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 22% is middle-third health share (≤ 23%). UCMR5: UCMR5 tested, none detected. Population rank #7,178 of 29,740 among systems serving 500+.
The verdict
Harris County MUD 239 is in the lower third by violation count (9; lower-third violation load (≤ 21 violations)). A low count does not mean the system is unmonitored - monitoring and reporting violations still appear in SDWIS. Population served is large (5,583; larger served population (> 3,309)), so household exposure scale sits behind the violation mix. Health-based share is 22% (middle-third health share (≤ 23%)). UCMR5 tested this system and reported no PFAS above the minimum reporting level.
- #7,178 of 29,740
- Population · /systems
- #752 of 3,040
- Population · TX
- 9
- Total EPA violations on record
- 22%
- 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
- 1,876
- County
- Harris
- School/Daycare
- No
- MCL Violations
- 2
- Monitoring Violations
- 4
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Lead and Copper Rule | MR | 4 | 2015 |
| Consumer Confidence Rule | Other | 2 | 1999 |
| Gross Alpha, Excl. Radon and U | MCL | 2 | 2004 |
Violation Count vs. the National Corpus
Harris County MUD 239 has 9 recorded EPA violations, 17% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 82% carry more. 22% of this system's own violations are health-based (2 of 9), and it ranks #7,178 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)
9 Among the lowest violation counts fewer violations than 82% 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
PFAS Testing Results (UCMR5)
Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 0 of 58 samples detected PFAS.
| Contaminant | Date | Result | MRL | Status |
|---|---|---|---|---|
| 8:2 FTS | 10/16/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFMPA | 10/16/2023 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFDA | 10/16/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFPeA | 10/16/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| 4:2 FTS | 10/16/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFPeS | 10/16/2023 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFMBA | 10/16/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHpS | 10/16/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFUnA | 10/16/2023 | <2.00 ppt | 2.00 ppt | Not Detected |
| PFOS | 10/16/2023 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFOA | 10/16/2023 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFHxA | 10/16/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFEESA | 10/16/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| ADONA | 10/16/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFDoA | 10/16/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| 11Cl-PF3OUdS | 10/16/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| NFDHA | 10/16/2023 | <20.00 ppt | 20.00 ppt | Not Detected |
| 9Cl-PF3ONS | 10/16/2023 | <2.00 ppt | 2.00 ppt | Not Detected |
| PFNA | 10/16/2023 | <4.00 ppt | 4.00 ppt | Not Detected |
| HFPO-DA | 10/16/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFBA | 10/16/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| 6:2 FTS | 10/16/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFTrDA | 10/16/2023 | <7.00 ppt | 7.00 ppt | Not Detected |
| NEtFOSAA | 10/16/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| NMeFOSAA | 10/16/2023 | <6.00 ppt | 6.00 ppt | Not Detected |
| PFBS | 10/16/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHxS | 10/16/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFTA | 10/16/2023 | <8.00 ppt | 8.00 ppt | Not Detected |
| PFHpA | 10/16/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHxA | 1/9/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFEESA | 1/9/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFMBA | 1/9/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFPeA | 1/9/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFMPA | 1/9/2023 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFPeS | 1/9/2023 | <4.00 ppt | 4.00 ppt | Not Detected |
| 8:2 FTS | 1/9/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| 4:2 FTS | 1/9/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| 6:2 FTS | 1/9/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFBA | 1/9/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| HFPO-DA | 1/9/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| ADONA | 1/9/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| 9Cl-PF3ONS | 1/9/2023 | <2.00 ppt | 2.00 ppt | Not Detected |
| NFDHA | 1/9/2023 | <20.00 ppt | 20.00 ppt | Not Detected |
| PFUnA | 1/9/2023 | <2.00 ppt | 2.00 ppt | Not Detected |
| NMeFOSAA | 1/9/2023 | <6.00 ppt | 6.00 ppt | Not Detected |
| PFDoA | 1/9/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFDA | 1/9/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFOA | 1/9/2023 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFOS | 1/9/2023 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFNA | 1/9/2023 | <4.00 ppt | 4.00 ppt | Not Detected |
Population served record for Harris County MUD 239
EPA SDWIS lists 5,583 people served and 1,876 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
9 violations · 5,583 served: nearest cross-state SDWIS matches.
Cross-state systems with similarly light violation ledgers
Nearest cross-state community systems (500+ served) by total SDWIS violations on record.
Cross-state systems with similar served population
Nearest cross-state systems by EPA SDWIS population_served (same 500+ sitemap gate).
What to do with Harris County MUD 239
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.