A81/100
CITY OF THE COLONY — Water Quality Report 2026
Serving 45,367 people · Texas
Water Source
Purchased Surface Water
County
—
System ID
TX0610081
Violations
5
Contaminant Test Results
2 contaminants above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
chlorate | 830.00 µg/L | — | Above Goal |
Lead (90th percentile) | < 0.001 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
1
Violation (last 5yr)
0
Unresolved
0
Health-Related
TIER 3Resolved
Failed to issue ongoing public notification
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: October 1, 2022 – November 10, 2022Rule: Ground Water RuleEnforcement: Resolving — corrective action underway
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 THE COLONY
Is CITY OF THE COLONY water safe to drink?
CITY OF THE COLONY water receives a grade of A (81/100), which is considered excellent. Out of 69 contaminants tested, none exceed EPA legal limits. 2 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has CITY OF THE COLONY detected?
69 contaminants were tested in CITY OF THE COLONY's water. Notable contaminants include Lead (90th percentile), chlorate. No contaminants exceed EPA legal limits. 2 exceed EPA health goals (MCLGs).
Does CITY OF THE COLONY have any EPA violations?
Yes, CITY OF THE COLONY has 5 EPA violation(s) on record, with the most recent in 2022. Violation types include MR, Other, MCL. 2 are health-based violations.
How many people does CITY OF THE COLONY serve?
CITY OF THE COLONY serves approximately 45,367 people, Texas.
What type of water does CITY OF THE COLONY provide?
CITY OF THE COLONY sources its water from purchased surface water. Surface water comes from rivers, lakes, or reservoirs and typically requires more extensive treatment. The utility's system ID is TX0610081.
How does CITY OF THE COLONY compare to other utilities in Texas?
CITY OF THE COLONY scores 81/100 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.