A81/100
Plano Tap Water Quality: Is It Safe to Drink? (2026 Report)
Serving 292,059 residents · Texas
What's In Plano's Tap Water?
76
Contaminants Tested
0
Exceed EPA Limits
2
Above EPA Goals
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
Water Utility Details
CITY OF PLANO
Population Served
292,059
Water Source
Purchased Surface Water
System ID
TX0430007
Frequently Asked Questions About Plano Water
Is Plano tap water safe to drink?
Plano, Texas tap water receives a grade of A (81/100), which is considered excellent. Out of 76 contaminants tested, none exceed EPA maximum contaminant levels (MCLs) and 2 exceed health guidelines (MCLGs). While the water meets federal standards, some residents may still choose to use a filter for additional peace of mind.
What contaminants are in Plano's water?
Of the 76 contaminants tested in Plano's water supply, the most notable include Lead (90th percentile), chlorate. No contaminants exceed EPA legal limits. 2 contaminant(s) exceed EPA health goals (MCLGs), which are non-enforceable targets set at levels with no known health risk.
Does Plano have any water quality violations?
Yes, Plano has 5 EPA violation(s) on record, with the most recent in 2011. Violation types include MCL, Other, MR. 2 of these are health-based violations, which are the most serious category.
Do I need a water filter in Plano?
Plano water meets EPA standards, so a filter is not strictly necessary. However, some residents prefer the added security of a water filter. EPA health goals (MCLGs) are stricter than legal limits and are set at levels with zero expected health risk. 2 contaminant(s) exceed these stricter goals.
Where does Plano's tap water come from?
Plano's drinking water is sourced from purchased surface water and supplied by CITY OF PLANO. The system serves approximately 292,059 people. Surface water sources include rivers, lakes, and reservoirs.
How often is Plano's water tested?
Under the Safe Drinking Water Act (SDWA), water utilities are required to regularly test for over 90 contaminants. Testing frequency varies by contaminant — some are tested monthly, others quarterly or annually. Plano's water systems must report results to the EPA and publish an annual Consumer Confidence Report (CCR). The data on this page reflects the latest available EPA testing data.
How does Plano's water compare to other cities in Texas?
Plano's water quality score of 81/100 earns a grade of A, which is considered excellent. This places Plano among the better-performing water systems in Texas. Visit our Texas state page to see how all cities in the state compare.
What should I do if I'm concerned about Plano's water quality?
If you have concerns about Plano's tap water, consider these steps: (1) Request your utility's annual Consumer Confidence Report for detailed local data. (2) Get your water independently tested through a state-certified laboratory. (3) Consider an NSF-certified water filter rated for the contaminants found in your area. (4) Contact your water utility (CITY OF PLANO) with specific questions. (5) Report water quality issues to your state drinking water program or the EPA Safe Drinking Water Hotline at 800-426-4791.