C46/100
Lago Vista Tap Water Quality: Is It Safe to Drink? (2026 Report)
Serving 11,533 residents · Texas
What's In Lago Vista's Tap Water?
31
Contaminants Tested
0
Exceed EPA Limits
1
Above EPA Goals
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Lead (90th percentile) | 0.002 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
10
Violations (last 5yr)
8
Unresolved
3
Health-Related
TIER 3Unresolved
Disinfection byproduct treatment technique failure
TIER 1 — URGENTUnresolved
Violation related to Nitrate
When: August 1, 2025 – August 31, 2025Rule: Surface Water Treatment RuleEnforcement: Informal — resolved cooperativelyVerify on EPA.gov
TIER 3Unresolved
Missed required monitoring deadline
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
TIER 1 — URGENTUnresolved
Violation related to Nitrate
When: July 1, 2025 – July 31, 2025Rule: Surface Water Treatment RuleEnforcement: Informal — resolved cooperativelyVerify on EPA.gov
TIER 3Resolved
Missed required monitoring deadline
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: July 1, 2025 – July 31, 2025Rule: Surface Water Treatment RuleEnforcement: Resolving — corrective action underway
TIER 3Unresolved
Missed required monitoring deadline
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
TIER 3Unresolved
Disinfection byproduct treatment technique failure
When: May 1, 2025Rule: Ground Water RuleEnforcement: Informal — resolved cooperativelyVerify on EPA.gov
TIER 3Unresolved
Reporting violation
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: October 17, 2024Rule: Ground Water RuleEnforcement: Informal — resolved cooperativelyVerify on EPA.gov
TIER 2Unresolved
Treatment technique violation
When: October 17, 2024Rule: Ground Water RuleEnforcement: Informal — resolved cooperativelyVerify on EPA.gov
TIER 3Resolved
Surface water treatment technique failure
When: July 1, 2023 – November 16, 2023Enforcement: 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
TRAVIS COUNTY WCID POINT VENTURE
Population Served
2,835
Water Source
Surface Water
System ID
TX2270038
CITY OF LAGO VISTA
Population Served
8,698
Water Source
Surface Water
System ID
TX2270092
Frequently Asked Questions About Lago Vista Water
Is Lago Vista tap water safe to drink?
Lago Vista, Texas tap water receives a grade of C (46/100), which is considered fair. 0 contaminant(s) exceed EPA maximum contaminant levels and 54 violation(s) are on record. Residents should consider using an NSF-certified water filter to reduce contaminant exposure.
What contaminants are in Lago Vista's water?
Of the 31 contaminants tested in Lago Vista's water supply, the most notable include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 contaminant(s) exceed EPA health goals (MCLGs), which are non-enforceable targets set at levels with no known health risk.
Does Lago Vista have any water quality violations?
Yes, Lago Vista has 54 EPA violation(s) on record, with the most recent in 2025. Violation types include Other, TT, MR. 12 of these are health-based violations, which are the most serious category.
Do I need a water filter in Lago Vista?
Lago Vista 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. 1 contaminant(s) exceed these stricter goals.
Where does Lago Vista's tap water come from?
Lago Vista's drinking water is sourced from surface water and supplied by TRAVIS COUNTY WCID POINT VENTURE and 1 other water system(s). The system serves approximately 11,533 people. Surface water sources include rivers, lakes, and reservoirs.
How often is Lago Vista'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. Lago Vista'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 Lago Vista's water compare to other cities in Texas?
Lago Vista's water quality score of 46/100 earns a grade of C, which is considered fair. This is a below-average score that indicates room for improvement. Visit our Texas state page to see how all cities in the state compare.
What should I do if I'm concerned about Lago Vista's water quality?
If you have concerns about Lago Vista'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 (TRAVIS COUNTY WCID POINT VENTURE) 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.