A94/100
CITY OF KATY — Water Quality Report 2026
Serving 25,253 people · Texas
Water Source
Groundwater
County
—
System ID
TX1010017
Violations
3
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Lead (90th percentile) | 0.003 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
1
Violation (last 5yr)
1
Unresolved
0
Health-Related
TIER 3Unresolved
Failed to conduct Level 1 Assessment
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
Understanding violation severity
Tier 1Urgent health risk. Utility must notify all customers within 24 hours.Tier 2Important health or treatment issue. Customers notified within 30 days.Tier 3Administrative or monitoring issue. Reported in the annual water quality report.
Source: EPA Safe Drinking Water Information System (SDWIS) · Updated quarterly
Frequently Asked Questions About CITY OF KATY
Is CITY OF KATY water safe to drink?
CITY OF KATY water receives a grade of A (94/100), which is considered excellent. Out of 66 contaminants tested, none exceed EPA legal limits. 1 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has CITY OF KATY detected?
66 contaminants were tested in CITY OF KATY's water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does CITY OF KATY have any EPA violations?
Yes, CITY OF KATY has 3 EPA violation(s) on record, with the most recent in 2025. Violation types include MR.
How many people does CITY OF KATY serve?
CITY OF KATY serves approximately 25,253 people, Texas.
What type of water does CITY OF KATY provide?
CITY OF KATY sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is TX1010017.
How does CITY OF KATY compare to other utilities in Texas?
CITY OF KATY scores 94/100 with a grade of A (excellent). This places it among the higher-performing utilities in the state. Visit our Texas state page for a full comparison of water systems.