A87/100
Southlake Tap Water Quality: Is It Safe to Drink? (2026 Report)
Serving 31,576 residents · Texas
What's In Southlake's Tap Water?
69
Contaminants Tested
0
Exceed EPA Limits
2
Above EPA Goals
2 contaminants above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
PFOS | 0.004 µg/L | 0.004 µg/L | Above Goal |
Lead (90th percentile) | 0.002 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2016.
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 SOUTHLAKE
Population Served
31,576
Water Source
Purchased Surface Water
System ID
TX2200075
Frequently Asked Questions About Southlake Water
Is Southlake tap water safe to drink?
Southlake, Texas tap water receives a grade of A (87/100), which is considered excellent. Out of 69 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 Southlake's water?
Of the 69 contaminants tested in Southlake's water supply, the most notable include PFOS, Lead (90th percentile). 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 Southlake have any water quality violations?
Yes, Southlake has 3 EPA violation(s) on record, with the most recent in 2016. Violation types include MCL, Other, MR. 1 of these are health-based violations, which are the most serious category.
Do I need a water filter in Southlake?
Southlake 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 Southlake's tap water come from?
Southlake's drinking water is sourced from purchased surface water and supplied by CITY OF SOUTHLAKE. The system serves approximately 31,576 people. Surface water sources include rivers, lakes, and reservoirs.
How often is Southlake'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. Southlake'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 Southlake's water compare to other cities in Texas?
Southlake's water quality score of 87/100 earns a grade of A, which is considered excellent. This places Southlake 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 Southlake's water quality?
If you have concerns about Southlake'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 SOUTHLAKE) 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.