City of South Houston
Municipal distribution system using purchased surface water and groundwater.
PWS-level water intelligence
South Houston, TX Water Quality Test Results
Use South Houston's 2025 water-quality report and verified public-water-system context before interpreting local test results or treatment needs.
✓ Official sources✓ System-specific✓ No invented city averages
Evidence status
Coverage model: Direct municipal PWS
The municipal report and results are verified, but the seven-digit PWS ID still needs to be normalized into this directory.
Partial measurementsSouth Houston’s 2025 report documents a blended context: purchased surface water from Houston’s Southeast Water Purification Plant and groundwater wells in the Gulf Coast aquifer.
System resolution
Which water system applies?
Houston Southeast Water Purification Plant entry point
Supplier results in the report apply to the purchased surface-water component.
Measured facts
Published measurements
2023–2025 City tap sampling; 0 sites over the 15 ppb action level.
2023–2025 City tap sampling; 0 sites over the 1.3 ppm action level.
2025 Houston Southeast Water Purification Plant entry-point result, about 7.3 gpg; not a blended citywide tap result.
2025 Houston Southeast Water Purification Plant entry-point result.
LADS interpretation
What the evidence means—and does not mean
- The 124 mg/L hardness value belongs to the purchased surface-water entry point, not every South Houston tap.
- The report states that surface water and groundwater may be mixed, which makes property testing important for equipment sizing.
- The report records a 2025 lead-service-line notification matter; it separately states there were no additional required health-effects violation notices.
Measured fact
Values above stay tied to their named system, units, sample or report year, and official source.
Publisher interpretationPlanning language is educational context. It is not an official safety determination, diagnosis, ranking, or equipment prescription.
Primary evidence
Official sources
Evidence before equipment