A92/100
CITY OF THORNDALE — Water Quality Report 2026
Serving 1,400 people · Texas
Water Source
Purchased Groundwater
County
—
System ID
TX1660003
Violations
5
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Lead (90th percentile) | 0.005 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
1
Violation (last 5yr)
0
Unresolved
0
Health-Related
TIER 3Resolved
Surface water treatment technique failure
When: July 1, 2023 – October 23, 2023Enforcement: 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 THORNDALE
Is CITY OF THORNDALE water safe to drink?
CITY OF THORNDALE water receives a grade of A (92/100), which is considered excellent. Out of 1 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 THORNDALE detected?
1 contaminants were tested in CITY OF THORNDALE's water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does CITY OF THORNDALE have any EPA violations?
Yes, CITY OF THORNDALE has 5 EPA violation(s) on record, with the most recent in 2023. Violation types include Other, MR.
How many people does CITY OF THORNDALE serve?
CITY OF THORNDALE serves approximately 1,400 people, Texas.
What type of water does CITY OF THORNDALE provide?
CITY OF THORNDALE sources its water from purchased groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is TX1660003.
How does CITY OF THORNDALE compare to other utilities in Texas?
CITY OF THORNDALE scores 92/100 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.