A81/100
CITY OF PLANO — Water Quality Report 2026
Serving 292,059 people · Texas
Water Source
Purchased Surface Water
County
—
System ID
TX0430007
Violations
5
Contaminant Test Results
2 contaminants above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
chlorate | 1170.00 µg/L | — | Above Goal |
Lead (90th percentile) | 0.001 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2011.
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 PLANO
Is CITY OF PLANO water safe to drink?
CITY OF PLANO water receives a grade of A (81/100), which is considered excellent. Out of 76 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 PLANO detected?
76 contaminants were tested in CITY OF PLANO's water. Notable contaminants include Lead (90th percentile), chlorate. No contaminants exceed EPA legal limits. 2 exceed EPA health goals (MCLGs).
Does CITY OF PLANO have any EPA violations?
Yes, CITY OF PLANO has 5 EPA violation(s) on record, with the most recent in 2011. Violation types include MCL, Other, MR. 2 are health-based violations.
How many people does CITY OF PLANO serve?
CITY OF PLANO serves approximately 292,059 people, Texas.
What type of water does CITY OF PLANO provide?
CITY OF PLANO 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 TX0430007.
How does CITY OF PLANO compare to other utilities in Texas?
CITY OF PLANO 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.