Is Collinsville, TX Tap Water Safe to Drink?
Graded D, with 1029 unresolved violations on record. See what was cited — and what it means for your tap. What to do next ↓
48/100
waterverge.com Collinsville, TX — Water Quality Report
Collinsville's drinking water received a grade of D (48 out of 100), indicating poor water quality. The city's 16 water systems serve approximately 4,740 residents using groundwater.
Lead levels were measured at 3.9 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 5819 violations on record, including 27 health-based violations. 1029 remain unresolved.
What to know about Collinsville's water
Collinsville ranks #802 out of 1067 cities in Texas for water quality, placing it among the lowest-rated in the state.
Collinsville 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 1776 violations in the past five years, suggesting a pattern of compliance challenges that residents should monitor closely.
Water quality score
See methodology →Is Collinsville, TX water safe to drink?
Collinsville's drinking water has significant quality concerns based on EPA testing data. With a grade of D (48/100), the system has issues across multiple categories. A water filter is recommended for all residents. The city's 16 water systems serve approximately 4,740 residents using groundwater (wells).
Recent water quality updates for Collinsville
A timeline of significant water quality events, violations, and data updates.
Latest EPA compliance and testing data incorporated into Collinsville's water quality assessment. Grade: D (48/100).
2 health-based. Contaminants: Lead and Copper Rule, Public Notice, Revised Total Coliform Rule.
Contaminants: Public Notice.
Contaminants: Public Notice.
Federal disaster declaration (FEMA DR-3294). Hurricane event — may have impacted local water infrastructure.
Federal disaster declaration (FEMA DR-1606). Hurricane event — may have impacted local water infrastructure.
Key contaminant findings
Based on the most recent EPA sampling data for Collinsville's water supply.
Well within EPA limits.
Violation history
Collinsville's water system has 5,819 total violations on record, including 27 health-based violations. 1,029 remain unresolved. 1776 violations were issued in the last 5 years.
Flood & environmental risk
Grayson County has experienced 2 federally declared disasters since 2005. 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 Timber Ck Nr Collinsville, Range Ck Nr Collinsville.
Where does Collinsville's water come from?
Collinsville's drinking water comes from groundwater (wells), supplied by 16 water systems serving approximately 4,740 people. Groundwater is generally less susceptible to surface contamination but can contain naturally occurring contaminants like arsenic, radon, and nitrate. Nearby water bodies include Timber Ck Nr Collinsville (river), Range Ck Nr Collinsville (river).
What Collinsville residents can do
Recommended: NSF-certified water filter. This addresses the specific contaminants found in Collinsville'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.
Run cold water for 30 seconds before drinking, especially in the morning. Lead and copper leach from household plumbing when water sits in pipes.
Data: EPA SDWIS, UCMR 5 (PFAS), FEMA, NOAA. Last updated May 2026.
Top contaminants to know
View all ↓Violation summary
Violations & advisories
Top industrial polluters within 10 miles of Collinsville
Industrial polluters nearby
Reported releases to surface water by facilities near Collinsville, ranked by pounds discharged annually.
| Facility | Top chemical | To surface water (lbs/yr) | Distance |
|---|---|---|---|
TEXAS MANUFACTURING CO WHITESBORO, TX76273 | — | — | 6.4 mi |
Source: EPA Toxic Release Inventory (TRI) 2023
Drought conditions
D1 — moderate droughtCooke 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
Grayson County has experienced 2 federally declared disasters since 2005. Flooding and severe weather can compromise water treatment infrastructure and introduce contaminants into drinking water supplies.
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. | 3.9 | 15 | ppb | Inorganic | Safe |
Lead level trend (90th percentile)
See how Collinsville compares by contaminant
Explore where Collinsville ranks among all Texas cities for specific contaminants.
Water source & infrastructure
Where Collinsville's water comes from
Collinsville'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 4,740 people through 16 water systems.
Water bodies near Collinsville
Collinsville is located near 2 notable water bodies. These water bodies contribute to the regional watershed and may indirectly affect groundwater quality.
Water systems serving Collinsville
| System Name | PWSID | Population | Source |
|---|---|---|---|
| CITY OF COLLINSVILLE | TX0910005 | 1,866 | GW |
| SUNSET WATER SYSTEM | TX1690007 | 570 | GW |
| PERRIN WATER SYSTEM | TX1190005 | 408 | GW |
| MYRA WATER SYSTEM | TX0490019 | 363 | GW |
| LOMA LINDA WATER SUPPLY | TX1250039 | 216 | GW |
| BRITTANY HILL WATER ASSOCIATION | TX0610181 | 189 | GW |
| ROLLING HILLS WATER SUPPLY | TX1550139 | 186 | GW |
| DENTON ESTATES MOBILE HOME PARK | TX0610016 | 156 | GW |
| HAMILTON ESTATES WATER SYSTEM | TX1012916 | 123 | GW |
| BINFORD PLACE SUBDIVISION | TX1011551 | 120 | GW |
| TARA PARK WATER SYSTEM | TX2370016 | 113 | GW |
| WHISPERING PINES LAKE WATER | TX2360038 | 108 | GW |
| PINE OAK FOREST WATER | TX1010751 | 105 | GW |
| SILVERWOODS SUBDIVISION | TX1010877 | 90 | GW |
| GREEN LAKE ESTATES WATER SUPPLY | TX1470034 | 66 | GW |
| SHELBY WATER | TX2100038 | 61 | GW |
How Collinsville compares
Full Texas rankings →Collinsville's score of 48/100 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 Collinsville, TX
Learn more about your water
Guides and resources related to Collinsville's water quality findings.
Explore water quality across Grayson
Frequently asked questions
Is Collinsville, TX tap water safe to drink?
Collinsville's water quality earned a grade of D (48/100). Significant issues have been found. A water filter is strongly recommended. The city ranks #802 out of 1067 cities tested in Texas.
What contaminants are in Collinsville's water?
Lead was measured at 3.9 ppb (90th percentile). 5819 violations are on record.
How is Collinsville'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 Collinsville?
Based on current data, basic filtration should suffice for additional peace of mind.
Where does Collinsville's water come from?
Collinsville's water is sourced from Groundwater. The city has 16 water systems serving approximately 4,740 residents.
What health violations has Collinsville's water system had?
Collinsville has 27 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. 1029 violations remain unresolved.
Is Collinsville's groundwater at risk of contamination?
Collinsville 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 5819 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 Collinsville's water compare to other cities?
Collinsville ranks #802 out of 1067 cities in Texas (better than 25% of state cities) and #13515 out of 15744 cities nationally (14th percentile). The grade of D reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.