D29/100
Trinity Tap Water Quality: Is It Safe to Drink? (2026 Report)
Serving 11,102 residents · Texas
What's In Trinity's Tap Water?
2
Contaminants Tested
1
Exceed EPA Limits
0
Above EPA Goals
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Copper (90th percentile) | 1.36 mg/L | 1.30 mg/L | Over Limit |
EPA Violation History
11
Violations (last 5yr)
1
Unresolved
1
Health-Related
TIER 3Unresolved
Disinfection byproduct treatment technique failure
When: July 26, 2024Rule: Ground Water RuleEnforcement: Informal — resolved cooperativelyVerify on EPA.gov
TIER 3Resolved
Disinfection byproduct treatment technique failure
When: February 1, 2023 – March 22, 2023Rule: Ground Water RuleEnforcement: Resolving — corrective action underway
TIER 3Resolved
Disinfection byproduct treatment technique failure
When: January 11, 2023 – January 23, 2023Rule: Ground Water RuleEnforcement: Resolving — corrective action underway
TIER 3Resolved
Monitoring / Reporting Violation
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: January 1, 2023 – June 30, 2023Rule: Ground Water RuleEnforcement: Resolving — corrective action underway
TIER 3Resolved
Disinfection byproduct treatment technique failure
When: December 1, 2022 – February 18, 2022Rule: Ground Water RuleEnforcement: Resolving — corrective action underway
TIER 3Resolved
Disinfection byproduct treatment technique failure
When: October 15, 2022 – April 6, 2022Rule: Ground Water 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: January 1, 2022 – January 31, 2022Rule: 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: December 1, 2021 – December 31, 2021Rule: 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: November 1, 2021 – November 30, 2021Rule: Total Coliform RuleEnforcement: Resolving — corrective action underway
TIER 3Resolved
Failed Level 2 Assessment under Revised Total Coliform Rule
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: October 1, 2021 – December 31, 2021Rule: Stage 1 DBPREnforcement: Resolving — corrective action underway
TIER 2Resolved
Maximum contaminant level violation
When: July 3, 2021 – September 23, 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
CITY OF TRINITY
Population Served
4,619
Water Source
Groundwater
System ID
TX2280002
TRINITY RURAL WSC 1
Population Served
1,700
Water Source
Surface Water
System ID
TX2280011
GLENDALE WSC
Population Served
1,458
Water Source
Groundwater
System ID
TX2280012
WESTWOOD SHORES MUD
Population Served
2,125
Water Source
Purchased Surface Water
System ID
TX2280016
TRINITY RURAL WSC 3
Population Served
1,200
Water Source
Groundwater
System ID
TX2280029
Frequently Asked Questions About Trinity Water
Is Trinity tap water safe to drink?
Trinity, Texas tap water receives a grade of D (29/100), which is considered poor. 1 contaminant(s) exceed EPA maximum contaminant levels and 368 violation(s) are on record. Residents should consider using an NSF-certified water filter to reduce contaminant exposure.
What contaminants are in Trinity's water?
Of the 2 contaminants tested in Trinity's water supply, the most notable include Copper (90th percentile). 1 contaminant(s) exceed EPA legal limits (MCLs). 1 contaminant(s) exceed EPA health goals (MCLGs), which are non-enforceable targets set at levels with no known health risk.
Does Trinity have any water quality violations?
Yes, Trinity has 368 EPA violation(s) on record, with the most recent in 2025. Violation types include MR, MCL, Other. 54 of these are health-based violations, which are the most serious category.
Do I need a water filter in Trinity?
Based on EPA data, using a water filter in Trinity 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 Trinity's tap water come from?
Trinity's drinking water is sourced from groundwater and supplied by CITY OF TRINITY and 4 other water system(s). The system serves approximately 11,102 people. Groundwater is pumped from underground aquifers, which often provides natural filtration.
How often is Trinity'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. Trinity'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 Trinity's water compare to other cities in Texas?
Trinity's water quality score of 29/100 earns a grade of D, which is considered poor. 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 Trinity's water quality?
If you have concerns about Trinity'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 TRINITY) 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.