F0/100
Los Fresnos Tap Water Quality: Is It Safe to Drink? (2026 Report)
Serving 6,009 residents · Texas
What's In Los Fresnos's Tap Water?
32
Contaminants Tested
1
Exceed EPA Limits
1
Above EPA Goals
2 contaminants above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Copper (90th percentile) | 1.75 mg/L | 1.30 mg/L | Over Limit |
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 LOS FRESNOS
Population Served
6,009
Water Source
Surface Water
System ID
TX0310004
Frequently Asked Questions About Los Fresnos Water
Is Los Fresnos tap water safe to drink?
Los Fresnos, Texas tap water receives a grade of F (0/100), which is considered failing. 1 contaminant(s) exceed EPA maximum contaminant levels and 65 violation(s) are on record. Residents should consider using an NSF-certified water filter to reduce contaminant exposure.
What contaminants are in Los Fresnos's water?
Of the 32 contaminants tested in Los Fresnos's water supply, the most notable include Copper (90th percentile), Lead (90th percentile). 1 contaminant(s) exceed EPA legal limits (MCLs). 2 contaminant(s) exceed EPA health goals (MCLGs), which are non-enforceable targets set at levels with no known health risk.
Does Los Fresnos have any water quality violations?
Yes, Los Fresnos has 65 EPA violation(s) on record, with the most recent in 2016. Violation types include TT, Other, MR. 15 of these are health-based violations, which are the most serious category.
Do I need a water filter in Los Fresnos?
Based on EPA data, using a water filter in Los Fresnos is recommended. 1 contaminant(s) exceed legal limits. An NSF-certified filter — such as a reverse osmosis or activated carbon system — can effectively reduce many common contaminants. Choose a filter certified to remove the specific contaminants found in your area.
Where does Los Fresnos's tap water come from?
Los Fresnos's drinking water is sourced from surface water and supplied by CITY OF LOS FRESNOS. The system serves approximately 6,009 people. Surface water sources include rivers, lakes, and reservoirs.
How often is Los Fresnos'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. Los Fresnos'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 Los Fresnos's water compare to other cities in Texas?
Los Fresnos's water quality score of 0/100 earns a grade of F, which is considered failing. This is a concerning score that suggests significant water quality issues. Visit our Texas state page to see how all cities in the state compare.
What should I do if I'm concerned about Los Fresnos's water quality?
If you have concerns about Los Fresnos'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 LOS FRESNOS) 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.