C51/100
Canyon Lake Tap Water Quality: Is It Safe to Drink? (2026 Report)
Serving 90,585 residents · Texas
What's In Canyon Lake's Tap Water?
54
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
6
Violations (last 5yr)
1
Unresolved
3
Health-Related
TIER 1 — URGENTResolved
Violation related to Nitrate
When: July 1, 2025 – July 31, 2025Rule: Surface Water Treatment RuleEnforcement: Resolving — corrective action underway
TIER 1 — URGENTResolved
Violation related to Nitrate
When: July 1, 2025 – July 31, 2025Rule: Surface Water Treatment RuleEnforcement: Resolving — corrective action underway
TIER 2Unresolved
Exceeded the Maximum Contaminant Level (running average)
TIER 3Resolved
Failed to conduct Level 2 Assessment
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: February 4, 2025 – May 6, 2025Rule: Stage 2 DBPREnforcement: Resolving — corrective action underway
TIER 3Resolved
Monitoring Violation
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: October 1, 2024 – October 31, 2024Rule: Total Coliform RuleEnforcement: Resolving — corrective action underway
TIER 3Resolved
Monitoring Violation
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: October 1, 2021 – October 31, 2021Rule: Total Coliform 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
ROCKIN J RANCH SUBDIVISION
Population Served
1,839
Water Source
Groundwater
System ID
TX0160030
CLWSC CANYON LAKE SHORES
Population Served
44,196
Water Source
Surface Water
System ID
TX0460019
SJWTX TRIPLE PEAK PLANT
Population Served
32,973
Water Source
Surface Water
System ID
TX0460172
SJWTX GLENWOOD SUBDIVISION
Population Served
2,985
Water Source
Purchased Surface Water
System ID
TX0460246
ROCKWALL RANCH SUBDIVISION
Population Served
1,773
Water Source
Groundwater
System ID
TX0460250
KENDALL WEST UTILITY
Population Served
4,062
Water Source
Purchased Surface Water
System ID
TX1300033
DEER CREEK WATER
Population Served
2,757
Water Source
Purchased Surface Water
System ID
TX2270049
Frequently Asked Questions About Canyon Lake Water
Is Canyon Lake tap water safe to drink?
Canyon Lake, Texas tap water receives a grade of C (51/100), which is considered fair. 1 contaminant(s) exceed EPA maximum contaminant levels and 220 violation(s) are on record. Residents should consider using an NSF-certified water filter to reduce contaminant exposure.
What contaminants are in Canyon Lake's water?
Of the 70 contaminants tested in Canyon Lake'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 Canyon Lake have any water quality violations?
Yes, Canyon Lake has 220 EPA violation(s) on record, with the most recent in 2025. Violation types include MON, TT, MCL. 28 of these are health-based violations, which are the most serious category.
Do I need a water filter in Canyon Lake?
Based on EPA data, using a water filter in Canyon Lake 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 Canyon Lake's tap water come from?
Canyon Lake's drinking water is sourced from groundwater and supplied by ROCKIN J RANCH SUBDIVISION and 6 other water system(s). The system serves approximately 90,585 people. Groundwater is pumped from underground aquifers, which often provides natural filtration.
How often is Canyon Lake'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. Canyon Lake'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 Canyon Lake's water compare to other cities in Texas?
Canyon Lake's water quality score of 51/100 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 Canyon Lake's water quality?
If you have concerns about Canyon Lake'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 (ROCKIN J RANCH SUBDIVISION) 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.