C57/100
CITY OF DENISON — Water Quality Report 2026
Serving 27,500 people · Texas
Water Source
Surface Water
County
—
System ID
TX0910003
Violations
21
Contaminant Test Results
2 contaminants above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
chlorate | 218.00 µg/L | — | Above Goal |
Lead (90th percentile) | 0.002 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
1
Violation (last 5yr)
0
Unresolved
0
Health-Related
TIER 3Resolved
Monitoring Violation
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: August 1, 2023 – August 31, 2023Rule: Total Coliform 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 DENISON
Is CITY OF DENISON water safe to drink?
CITY OF DENISON water receives a grade of C (57/100), which is considered fair. 0 contaminant(s) exceed EPA legal limits and 21 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has CITY OF DENISON detected?
69 contaminants were tested in CITY OF DENISON's water. Notable contaminants include Lead (90th percentile), chlorate. No contaminants exceed EPA legal limits. 2 exceed EPA health goals (MCLGs).
Does CITY OF DENISON have any EPA violations?
Yes, CITY OF DENISON has 21 EPA violation(s) on record, with the most recent in 2023. Violation types include MON, Other, MR. 4 are health-based violations.
How many people does CITY OF DENISON serve?
CITY OF DENISON serves approximately 27,500 people, Texas.
What type of water does CITY OF DENISON provide?
CITY OF DENISON sources its water from surface water. Surface water comes from rivers, lakes, or reservoirs and typically requires more extensive treatment. The utility's system ID is TX0910003.
How does CITY OF DENISON compare to other utilities in Texas?
CITY OF DENISON scores 57/100 with a grade of C (fair). This score indicates room for improvement compared to other utilities. Visit our Texas state page for a full comparison of water systems.