Is Trinity, TX Tap Water Safe to Drink?
Graded F — but Copper was detected above EPA limits. Here's what's in the water and how to remove it. What to do next ↓
43/100
waterverge.com Trinity, TX — Water Quality Report
Trinity's drinking water received a grade of F (43 out of 100), indicating failing water quality. The city's 7 water systems serve approximately 11,650 residents using groundwater.
Lead levels were measured at 0.0 ppb (90th percentile), well within EPA limits. This system has not yet been tested for PFAS under the EPA UCMR 5 program.
The system has 505 violations on record, including 63 health-based violations. 185 remain unresolved.
What to know about Trinity's water
Trinity ranks #940 out of 1067 cities in Texas for water quality, placing it among the lowest-rated in the state.
Trinity relies on groundwater, which is generally less vulnerable to surface contamination but can be affected by naturally occurring minerals like arsenic and nitrate, as well as agricultural and industrial runoff.
The system has seen 237 violations in the past five years, suggesting a pattern of compliance challenges that residents should monitor closely.
Water quality score
See methodology →Is Trinity, TX water safe to drink?
Trinity's drinking water has significant quality concerns based on EPA testing data. With a grade of F (43/100), the system has issues across multiple categories. A water filter is recommended for all residents. The city's 7 water systems serve approximately 11,650 residents using groundwater (wells).
Recent water quality updates for Trinity
A timeline of significant water quality events, violations, and data updates.
Latest EPA compliance and testing data incorporated into Trinity's water quality assessment. Grade: F (43/100).
Contaminants: Revised Total Coliform Rule.
1 health-based. Contaminants: TTHM.
Contaminants: E. COLI, Revised Total Coliform Rule.
Federal disaster declaration (FEMA DR-4798). Hurricane event — may have impacted local water infrastructure.
Federal disaster declaration (FEMA DR-4781). Flood event — may have impacted local water infrastructure.
Key contaminant findings
Based on the most recent EPA sampling data for Trinity's water supply.
Well within EPA limits.
Exceeds EPA action level. Copper can leach from household plumbing — flush taps for 30 seconds before drinking.
Violation history
Trinity's water system has 505 total violations on record, including 63 health-based violations. 185 remain unresolved. 237 violations were issued in the last 5 years.
Flood & environmental risk
Trinity County has experienced 7 federally declared disasters since 2008. Flooding and severe storms can overwhelm water treatment plants, cause sewage overflows, and introduce agricultural runoff, bacteria, and sediment into drinking water supplies. Local water sources include Nelson Ck Nr Riverside, Harmon Ck Nr Riverside, Trinity Rv At Riverside, White Rock Ck At Sh 94 Nr Trinity.
Where does Trinity's water come from?
Trinity's drinking water comes from groundwater (wells), supplied by 7 water systems serving approximately 11,650 people. Groundwater is generally less susceptible to surface contamination but can contain naturally occurring contaminants like arsenic, radon, and nitrate. Nearby water bodies include Nelson Ck Nr Riverside (river), Harmon Ck Nr Riverside (river), Trinity Rv At Riverside (river), White Rock Ck At Sh 94 Nr Trinity (river).
What Trinity residents can do
Recommended: NSF-certified water filter. This addresses the specific contaminants found in Trinity's water.
Your water utility is required to publish an annual Consumer Confidence Report (CCR) with detailed testing results. Ask for the latest copy or check your utility's website.
Trinity's area has a history of flooding. After severe weather, watch for boil water advisories from your local utility.
Data: EPA SDWIS, UCMR 5 (PFAS), FEMA, NOAA. Last updated May 2026.
Top contaminants to know
View all ↓Violation summary
Violations & advisories
Drought conditions
D1 — moderate droughtTrinity County is currently in D1 (moderate drought) per the U.S. Drought Monitor (week of May 5, 2026). Drought can elevate disinfection-byproduct (TTHM/HAA5) levels and taste/odor issues as utilities draw from lower reservoirs.
Source: U.S. Drought Monitor, updated weekly by NDMC, USDA, and NOAA.
Flood & disaster history
Trinity County has experienced 7 federally declared disasters since 2008. Flooding and severe weather can compromise water treatment infrastructure and introduce contaminants into drinking water supplies.
Recommended water filters
Based on contaminants detected in Trinity's water supply, we recommend the following filter types.
Full contaminants report
| Contaminant | Detected Level | EPA Limit | Unit | Category | Status |
|---|---|---|---|---|---|
| Lead (90th percentile) LeadHeavy Metal A toxic heavy metal that can leach into drinking water from older pipes, solder, and fixtures. No amount of lead in water is considered safe. Health EffectsBrain and nervous system damage in children, kidney damage, high blood pressure, and reproductive problems in adults. EPA Limit15 ppb action level Common SourcesCorrosion of lead pipes, lead solder, brass faucets, and household plumbing. | 0.0 | 15 | ppb | Inorganic | Safe |
| Copper (90th percentile) CopperInorganic A metal that enters drinking water mainly through corrosion of copper plumbing. Small amounts are essential for health, but excess levels are harmful. Health EffectsGastrointestinal distress (nausea, vomiting, diarrhea) at short-term high levels; liver and kidney damage from long-term exposure. EPA Limit1.3 mg/L action level Common SourcesCorrosion of copper household plumbing, erosion of natural deposits. | 2.70 | 1.3 | mg/L | Inorganic | Over Limit |
Lead level trend (90th percentile)
Copper level trend (90th percentile)
See how Trinity compares by contaminant
Explore where Trinity ranks among all Texas cities for specific contaminants.
Water source & infrastructure
Where Trinity's water comes from
Trinity's drinking water is drawn from underground aquifers through wells.
Groundwater is naturally filtered through rock and soil layers, generally requiring less treatment than surface water. However, it can contain naturally occurring contaminants like arsenic, radon, and minerals.
Agricultural activity, septic systems, and industrial operations near well fields can introduce nitrates, pesticides, and volatile organic compounds.
The system is operated by local government ownership and serves approximately 11,650 people through 7 water systems.
Water bodies near Trinity
Trinity is located near 4 notable water bodies. These water bodies contribute to the regional watershed and may indirectly affect groundwater quality.
Water systems serving Trinity
| System Name | PWSID | Population | Source |
|---|---|---|---|
| CITY OF TRINITY | TX2280002 | 4,619 | GW |
| WESTWOOD SHORES MUD | TX2280016 | 2,125 | SWP |
| TRINITY RURAL WSC 1 | TX2280011 | 1,700 | SW |
| GLENDALE WSC | TX2280012 | 1,458 | GW |
| TRINITY RURAL WSC 3 | TX2280029 | 1,200 | GW |
| TRINITY RURAL WSC 2 | TX2280028 | 322 | SWP |
| DEER RUN AND WHITE ROCK CITY MARINA | TX2280039 | 226 | SWP |
How Trinity compares
Full Texas rankings →Trinity's score of 43/100 is on par with the average of 46/100 among major Texas cities. It outscores 7 of 10 nearby cities.
Nearby cities
View Texas rankings →About Trinity, TX
Wikipedia →Trinity is a city in Trinity County, Texas, United States. The population was 2,343 at the 2020 census.
Learn more about your water
Guides and resources related to Trinity's water quality findings.
Explore water quality across Trinity
Frequently asked questions
Is Trinity, TX tap water safe to drink?
Trinity's water quality earned a grade of F (43/100). Significant issues have been found. A water filter is strongly recommended. The city ranks #940 out of 1067 cities tested in Texas.
What contaminants are in Trinity's water?
Lead was measured at 0.0 ppb (90th percentile). 505 violations are on record.
How is Trinity's water quality grade calculated?
The grade is based on four factors: violation history (40%), lead and copper levels (25%), PFAS contamination (25%), and regulatory compliance (10%). The score is also adjusted based on how complete the available data is. See our methodology page for full details.
Do I need a water filter in Trinity?
Based on current data, basic filtration should suffice for additional peace of mind.
Where does Trinity's water come from?
Trinity's water is sourced from Groundwater. The city has 7 water systems serving approximately 11,650 residents.
What health violations has Trinity's water system had?
Trinity has 63 health-based violations on record. The most recent violation was recorded in December 2025. Health-based violations mean the water exceeded EPA maximum contaminant levels (MCLs) for a regulated substance. 185 violations remain unresolved.
Is Trinity's groundwater at risk of contamination?
Trinity uses groundwater, which can be affected by naturally occurring contaminants like arsenic, radon, and nitrate, as well as agricultural runoff and industrial activity. The system has 505 violations on record that may relate to groundwater quality. Groundwater systems are generally less susceptible to surface contamination but should be monitored for emerging contaminants like PFAS.
How does Trinity's water compare to other cities?
Trinity ranks #940 out of 1067 cities in Texas (better than 12% of state cities) and #14654 out of 15744 cities nationally (7th percentile). The grade of F reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.