CITY OF HOUSTON
PWSID: TX1010013 · Houston, TX · Serves 2,970,543 people
According to EPA Safe Drinking Water Information System (SDWIS), CITY OF HOUSTON (PWSID TX1010013) in Houston, TX is listed as a CWS water system covering about 2,970,543 people. The same extract lists 2 health-based violation records spanning 2025-2025. Those 2 health-based rows for CITY OF HOUSTON cover contaminants such as Interim Enhanced Surface Water Treatment Rule; they remain historical EPA registry entries, not a current compliance or drinkability score.
CITY OF HOUSTON has 2 health-based violation records in this historical extract. Monitoring and reporting records are not included.
PlainEnviro's health-based SDWIS extract covers monitoring and reporting violations only -- it does not include unresolved enforcement actions in progress or corrective steps a utility has taken since the extract date. 1 distinct EPA contaminant code appears in this system's record, including Interim Enhanced Surface Water Treatment Rule. Recorded violations span 2025–2025. Day-to-day primacy enforcement for this system runs through the Texas drinking-water program, not EPA directly.
A historical health-based record does not necessarily describe current water quality or compliance. The most authoritative current source is the utility's annual Consumer Confidence Report. For enforcement history and corrective-action orders, consult EPA ECHO and the Texas state drinking-water program's public portal.
System Details
- EPA ID (PWSID)
- TX1010013
- System Type
- CWS
- Water Source
- Surface Water
- Location
- Houston, TX
- Population Served
- 2,970,543
- Health Violations
- Yes (2)
What contaminants are in this water system?
| Contaminant | Violations | Health-Based |
|---|---|---|
| Interim Enhanced Surface Water Treatment Rule | 2 | 2 |
Violation History (2)
| Contaminant | Health | Date |
|---|---|---|
| Interim Enhanced Surface Water Treatment Rule | Yes | May 1, 2025 |
| Interim Enhanced Surface Water Treatment Rule | Yes | May 1, 2025 |
Frequently Asked Questions
What does EPA SDWIS list for CITY OF HOUSTON?
How many people does CITY OF HOUSTON serve?
What violations does CITY OF HOUSTON have?
What contaminants have been found in CITY OF HOUSTON water?
Compare beyond Texas
Nationwide peers by violations & population served
Cross-state SDWIS systems nearest CITY OF HOUSTON on cumulative violation count (2) and EPA-reported population served (2,970,543). Violation-count peers include SAINT REGIS MOHAWK TRIBE, REDBY/RED LAKE, Cochiti Pueblo. Population peers include CHICAGO, MWRA, MDWASA - MAIN SYSTEM.
Similar violation count
Nearest cross-state community systems (500+ served) by SDWIS violations on record.
Similar population served
Nearest cross-state systems by EPA SDWIS population_served (same 500+ gate).
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About This Data
CITY OF HOUSTON (TX1010013) is drawn from EPA SDWIS. Health-based rows in this extract are MCL and Treatment Technique records spanning 2025-2025 covering Interim Enhanced Surface Water Treatment Rule. Historical registry entries, not a current drinkability score.
Source: U.S. Environmental Protection Agency, SDWIS Federal Reporting Services
Read our methodology - how this data is sourced, computed, and verified.