B78/100
Rockwall Tap Water Quality: Is It Safe to Drink? (2026 Report)
Serving 73,330 residents · Texas
What's In Rockwall'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 |
|---|---|---|---|
chlorate | 352.00 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 2013.
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
FORNEY LAKE WSC
Population Served
16,188
Water Source
Purchased Surface Water
System ID
TX1290014
CITY OF ROCKWALL
Population Served
47,251
Water Source
Purchased Surface Water
System ID
TX1990001
MOUNT ZION WSC
Population Served
2,028
Water Source
Purchased Surface Water
System ID
TX1990010
R C H WSC
Population Served
7,863
Water Source
Purchased Surface Water
System ID
TX1990012
Frequently Asked Questions About Rockwall Water
Is Rockwall tap water safe to drink?
Rockwall, Texas tap water receives a grade of B (78/100), which is considered good. Out of 70 contaminants tested, 1 exceed EPA maximum contaminant levels (MCLs) and 3 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 Rockwall's water?
Of the 70 contaminants tested in Rockwall's water supply, the most notable include Copper (90th percentile), Lead (90th percentile), chlorate. 1 contaminant(s) exceed EPA legal limits (MCLs). 3 contaminant(s) exceed EPA health goals (MCLGs), which are non-enforceable targets set at levels with no known health risk.
Does Rockwall have any water quality violations?
Yes, Rockwall has 35 EPA violation(s) on record, with the most recent in 2025. Violation types include Other, RPT, TT. 4 of these are health-based violations, which are the most serious category.
Do I need a water filter in Rockwall?
Based on EPA data, using a water filter in Rockwall 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 Rockwall's tap water come from?
Rockwall's drinking water is sourced from purchased surface water and supplied by FORNEY LAKE WSC and 3 other water system(s). The system serves approximately 73,330 people. Surface water sources include rivers, lakes, and reservoirs.
How often is Rockwall'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. Rockwall'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 Rockwall's water compare to other cities in Texas?
Rockwall's water quality score of 78/100 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 Rockwall's water quality?
If you have concerns about Rockwall'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 (FORNEY LAKE WSC) 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.