B75/100
San Leon Tap Water Quality: Is It Safe to Drink? (2026 Report)
Serving 11,622 residents · Texas
What's In San Leon's Tap Water?
31
Contaminants Tested
0
Exceed EPA Limits
0
Above EPA Goals
EPA Violation History
3
Violations (last 5yr)
0
Unresolved
0
Health-Related
TIER 3Resolved
Monitoring / Reporting Violation
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: December 30, 2024 – February 24, 2025Rule: Ground Water RuleEnforcement: Resolving — corrective action underway
TIER 3Resolved
Disinfection byproduct treatment technique failure
When: September 1, 2021 – December 4, 2023Rule: Ground Water RuleEnforcement: Resolving — corrective action underway
TIER 3Resolved
Disinfection byproduct treatment technique failure
When: August 1, 2021 – December 4, 2023Rule: Ground Water 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
Water Utility Details
SAN LEON MUD
Population Served
11,622
Water Source
Purchased Surface Water
System ID
TX0840063
Frequently Asked Questions About San Leon Water
Is San Leon tap water safe to drink?
San Leon, Texas tap water receives a grade of B (75/100), which is considered good. Out of 31 contaminants tested, none exceed EPA maximum contaminant levels (MCLs). While the water meets federal standards, some residents may still choose to use a filter for additional peace of mind.
What contaminants are in San Leon's water?
31 contaminants were tested in San Leon's water supply. No contaminants exceed EPA legal limits (MCLs) or health goals (MCLGs), which is a positive indicator of water quality.
Does San Leon have any water quality violations?
Yes, San Leon has 21 EPA violation(s) on record, with the most recent in 2024. Violation types include MR, Other, MON. 1 of these are health-based violations, which are the most serious category.
Do I need a water filter in San Leon?
San Leon 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. All contaminants are within health goals.
Where does San Leon's tap water come from?
San Leon's drinking water is sourced from purchased surface water and supplied by SAN LEON MUD. The system serves approximately 11,622 people. Surface water sources include rivers, lakes, and reservoirs.
How often is San Leon'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. San Leon'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 San Leon's water compare to other cities in Texas?
San Leon's water quality score of 75/100 earns a grade of B, which is considered good. This is an above-average score compared to many cities nationwide. Visit our Texas state page to see how all cities in the state compare.
What should I do if I'm concerned about San Leon's water quality?
If you have concerns about San Leon'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 (SAN LEON MUD) 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.