Katy Water Quality
Texas
According to EPA SDWIS, Katy, Texas is served by 8 community water systems covering about 44,458 people. The same extract lists 41 health-based violation records, most recently coded 5000 in 2023. Counts are historical EPA registry rows, not a current compliance or drinkability score.
Drinking water in Katy, Texas is delivered through 8 EPA-regulated community water systems serving an estimated 44,458 people. Each system is tracked in the EPA Safe Drinking Water Information System (SDWIS) under the Safe Drinking Water Act, which requires testing for regulated contaminants, consumer notification of violations, and publication of an annual Consumer Confidence Report.
PlainEnviro's health-based SDWIS extract shows 41 violation records across the 8 active community systems shown here. Monitoring and reporting records are not present in the extract. The records carry 4 distinct EPA contaminant codes: Lead and Copper Rule, Revised Total Coliform Rule, Gross Alpha, Excl. Radon and U, Combined Radium (-226 and -228). 11 TRI-reporting industrial facilities are also located within the city limits.
A past EPA health-based registry row does not describe water delivered today or current compliance status; utilities notify customers and remediate under state primacy oversight when required. For current water-quality status and treatment practices, review your local utility's most recent Consumer Confidence Report or contact the Texas drinking water program. All records above reflect federal EPA SDWIS data and are not independently verified against state databases.
Community Water Systems
| System Name | Pop. Served | Violations | Status |
|---|---|---|---|
| CITY OF KATY | 25,253 | 0 | Clean |
| MASON CREEK UTILITY DISTRICT | 8,900 | 0 | Clean |
| FORT BEND COUNTY MUD 5 | 4,665 | 0 | Clean |
| LANCASTER MUD 1 | 2,685 | 2 | Health |
| MONTGOMERY COUNTY MUD 137 | 2,409 | 0 | Clean |
| WALLER COUNTY MUD 35 | 411 | 0 | Clean |
| CHANTICOR SERIES | 90 | 39 | Health |
| AUGUST LAKES WSC | 45 | 0 | Clean |
Does this city have health-based water violations?
These health-based records can represent Maximum Contaminant Level (MCL), Treatment Technique (TT), or Maximum Residual Disinfectant Level (MRDL) categories. A historical record does not establish that water is currently unsafe.
| Water system | Contaminant | Begin Date |
|---|---|---|
| CHANTICOR SERIES | Lead and Copper Rule | 2023-10-01 |
| CHANTICOR SERIES | Lead and Copper Rule | 2020-02-17 |
| CHANTICOR SERIES | Lead and Copper Rule | 2020-02-17 |
| CHANTICOR SERIES | Lead and Copper Rule | 2017-10-01 |
| LANCASTER MUD 1 | Revised Total Coliform Rule | 2016-07-21 |
| LANCASTER MUD 1 | Revised Total Coliform Rule | 2016-07-21 |
| CHANTICOR SERIES | Gross Alpha, Excl. Radon and U | 2016-01-01 |
| CHANTICOR SERIES | Combined Radium (-226 and -228) | 2015-10-01 |
| CHANTICOR SERIES | Gross Alpha, Excl. Radon and U | 2015-10-01 |
| CHANTICOR SERIES | Combined Radium (-226 and -228) | 2015-07-01 |
| CHANTICOR SERIES | Gross Alpha, Excl. Radon and U | 2015-07-01 |
| CHANTICOR SERIES | Combined Radium (-226 and -228) | 2015-04-01 |
| CHANTICOR SERIES | Gross Alpha, Excl. Radon and U | 2015-04-01 |
| CHANTICOR SERIES | Combined Radium (-226 and -228) | 2015-01-01 |
| CHANTICOR SERIES | Gross Alpha, Excl. Radon and U | 2015-01-01 |
| CHANTICOR SERIES | Combined Radium (-226 and -228) | 2014-10-01 |
| CHANTICOR SERIES | Gross Alpha, Excl. Radon and U | 2014-10-01 |
| CHANTICOR SERIES | Combined Radium (-226 and -228) | 2014-07-01 |
| CHANTICOR SERIES | Gross Alpha, Excl. Radon and U | 2014-07-01 |
| CHANTICOR SERIES | Combined Radium (-226 and -228) | 2014-04-01 |
| CHANTICOR SERIES | Gross Alpha, Excl. Radon and U | 2014-04-01 |
| CHANTICOR SERIES | Combined Radium (-226 and -228) | 2014-01-01 |
| CHANTICOR SERIES | Gross Alpha, Excl. Radon and U | 2014-01-01 |
| CHANTICOR SERIES | Combined Radium (-226 and -228) | 2013-10-01 |
| CHANTICOR SERIES | Gross Alpha, Excl. Radon and U | 2013-10-01 |
| CHANTICOR SERIES | Combined Radium (-226 and -228) | 2013-07-01 |
| CHANTICOR SERIES | Gross Alpha, Excl. Radon and U | 2013-07-01 |
| CHANTICOR SERIES | Combined Radium (-226 and -228) | 2013-04-01 |
| CHANTICOR SERIES | Gross Alpha, Excl. Radon and U | 2013-04-01 |
| CHANTICOR SERIES | Combined Radium (-226 and -228) | 2013-01-01 |
| CHANTICOR SERIES | Gross Alpha, Excl. Radon and U | 2013-01-01 |
| CHANTICOR SERIES | Combined Radium (-226 and -228) | 2012-10-01 |
| CHANTICOR SERIES | Gross Alpha, Excl. Radon and U | 2012-10-01 |
| CHANTICOR SERIES | Combined Radium (-226 and -228) | 2012-07-01 |
| CHANTICOR SERIES | Gross Alpha, Excl. Radon and U | 2012-07-01 |
| CHANTICOR SERIES | Combined Radium (-226 and -228) | 2012-04-01 |
| CHANTICOR SERIES | Gross Alpha, Excl. Radon and U | 2012-04-01 |
| CHANTICOR SERIES | Combined Radium (-226 and -228) | 2012-01-01 |
| CHANTICOR SERIES | Gross Alpha, Excl. Radon and U | 2012-01-01 |
| CHANTICOR SERIES | Combined Radium (-226 and -228) | 2011-10-01 |
| CHANTICOR SERIES | Gross Alpha, Excl. Radon and U | 2011-10-01 |
What are Katy's health-based records for?
Katy's health-based violation records carry 4 distinct EPA codes: some name a substance, others the drinking-water rule that was breached. Counts are records on file in the EPA SDWIS extract, not current test results.
| Contaminant | Records | Systems |
|---|---|---|
| Gross Alpha, Excl. Radon and U | 18 | 1 |
| Combined Radium (-226 and -228) | 17 | 1 |
| Lead and Copper Rule | 4 | 1 |
| Revised Total Coliform Rule | 2 | 1 |
TRI Facilities in Katy
| Facility | Total Releases |
|---|---|
| K-T Galvanizing Co | 80.4K lbs |
| Dyna Drill Technologies LLC | 50.6K lbs |
| Allied Plant 11 - East Katy | 15 lbs |
| Pfp Industries LLC | 5 lbs |
| Katy Plant | 1 lbs |
| Powerohm Resistors Inc a Div of Hubbell Industrial Controls | 1 lbs |
| Katy Bagging Facility | 1 lbs |
| Pavestone - Katy Tx Plant | 0 lbs |
| Hm South Texas Concrete LLC - Katy Rmc | 0 lbs |
| Pavestone - Katy Tx Plant | 0 lbs |
Frequently Asked Questions
What does EPA SDWIS list for drinking water in Katy, Texas? ▼
How many water violations does Katy have in this EPA extract? ▼
What contaminants were found in Katy water? ▼
How many water systems serve Katy? ▼
Where does Katy get its drinking water? ▼
Are there pollution sources near Katy? ▼
How does Katy compare in Texas?
Of the 1,232 Texas places with at least one community water system on file, Katy ranks #55 by number of systems (8).
Either side of it: Del Rio (8), Granbury (8), Kilgore (8), Mexia (8)
About This Data
Figures here are the current EPA SDWIS extract joined to the 8 community water systems whose service area lists Katy, ranked against the 1,232 Texas places with at least one system on file. Data current as of 2026-08-25.
Water system data comes from the EPA's Safe Drinking Water Information System (SDWIS). PlainEnviro's violation fetch is restricted upstream to records EPA flags as health-based and then joined to active community water systems. Monitoring and reporting violations are not included.
A health-based violation row in this extract is a historical EPA registry entry. It does not describe water delivered today or current compliance status. Many records are later resolved, and public water systems notify customers when required. For current conditions, contact your local water utility or the state drinking water program.
TRI facility data comes from the EPA Toxic Release Inventory. Facilities shown are those that self-report to the TRI program. PlainEnviro presents this data without advocacy framing.
Read our methodology - how this data is sourced, computed, and verified.