Is Duchesne, UT 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 ↓
43.7/100
waterverge.com Duchesne, UT — Water Quality Report
Duchesne's drinking water received a grade of F (43.7 out of 100), indicating failing water quality. The city's 6 water systems serve approximately 5,991 residents using purchased surface water.
Lead levels were measured at 1.8 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 198 violations on record, including 8 health-based violations. 44 remain unresolved.
What to know about Duchesne's water
Duchesne ranks #162 out of 177 cities in Utah for water quality, placing it among the lowest-rated in the state.
The city draws from surface water sources, which are more susceptible to seasonal runoff and agricultural contamination, requiring extensive multi-barrier treatment including coagulation, filtration, and disinfection.
The system has seen 13 violations in the past five years, suggesting a pattern of compliance challenges that residents should monitor closely.
Water quality score
See methodology →Is Duchesne, UT water safe to drink?
Duchesne's drinking water has significant quality concerns based on EPA testing data. With a grade of F (43.7/100), the system has issues across multiple categories. A water filter is recommended for all residents. The city's 6 water systems serve approximately 5,991 residents using surface water (rivers, lakes, or reservoirs).
Recent water quality updates for Duchesne
A timeline of significant water quality events, violations, and data updates.
Latest EPA compliance and testing data incorporated into Duchesne's water quality assessment. Grade: F (43.7/100).
Contaminants: Consumer Confidence Rule.
Contaminants: Consumer Confidence Rule.
Contaminants: Consumer Confidence Rule.
Federal disaster declaration (FEMA DR-4011). Flood event — may have impacted local water infrastructure.
Federal disaster declaration (FEMA DR-3223). Coastal Storm event — may have impacted local water infrastructure.
Key contaminant findings
Based on the most recent EPA sampling data for Duchesne'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
Duchesne's water system has 198 total violations on record, including 8 health-based violations. 44 remain unresolved. 13 violations were issued in the last 5 years.
Flood & environmental risk
Duchesne County has experienced 3 federally declared disasters since 1983. Flooding and severe storms can overwhelm water treatment plants, cause sewage overflows, and introduce agricultural runoff, bacteria, and sediment into drinking water supplies.
Where does Duchesne's water come from?
Duchesne's drinking water comes from surface water (rivers, lakes, or reservoirs), supplied by 6 water systems serving approximately 5,991 people. Surface water sources are more susceptible to contamination from runoff, industrial discharge, and algal blooms, requiring extensive treatment.
What Duchesne residents can do
Recommended: NSF-certified water filter. This addresses the specific contaminants found in Duchesne'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.
Duchesne'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
D3 — extreme droughtDuchesne County is currently in D3 (extreme 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
Duchesne County has experienced 3 federally declared disasters since 1983. Flooding and severe weather can compromise water treatment infrastructure and introduce contaminants into drinking water supplies.
Recommended water filters
Based on contaminants detected in Duchesne'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. | 1.8 | 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. | 1.81 | 1.3 | mg/L | Inorganic | Over Limit |
Lead level trend (90th percentile)
Copper level trend (90th percentile)
See how Duchesne compares by contaminant
Explore where Duchesne ranks among all Utah cities for specific contaminants.
Water source & infrastructure
Where Duchesne's water comes from
Duchesne's drinking water comes primarily from surface water sources such as rivers, lakes, or reservoirs.
Surface water systems require multi-stage treatment including coagulation, sedimentation, filtration, and disinfection to meet EPA Safe Drinking Water Act standards.
These sources can be impacted by seasonal changes, stormwater runoff, upstream agriculture, and industrial discharge.
The system is operated by local government ownership and serves approximately 5,991 people through 6 water systems.
Water systems serving Duchesne
| System Name | PWSID | Population | Source |
|---|---|---|---|
| DUCHESNE WATER SYSTEM | UTAH07001 | 2,000 | SWP |
| JOHNSON WATER DISTRICT | UTAH07006 | 1,895 | SWP |
| EAST DUCHESNE CULINARY WID | UTAH07051 | 1,000 | SWP |
| PINION FOREST SSD | UTAH07073 | 640 | GW |
| SOUTH DUCHESNE CULINARY WATER | UTAH07067 | 286 | SWP |
| JOHNSON WATER DISTRICT - INDEPENDENCE | UTAH24042 | 170 | GWP |
How Duchesne compares
Full Utah rankings →Duchesne's score of 43.7/100 is below the average of 50/100 among major Utah cities. It outscores 4 of 10 nearby cities. 6 of 10 nearby cities score higher.
Nearby cities
View Utah rankings →About Duchesne, UT
Wikipedia →Duchesne is a city in and the county seat of Duchesne County, Utah, United States. The population was 1,588 at the 2020 census.
Learn more about your water
Guides and resources related to Duchesne's water quality findings.
Explore water quality across Duchesne
Frequently asked questions
Is Duchesne, UT tap water safe to drink?
Duchesne's water quality earned a grade of F (43.7/100). Significant issues have been found. A water filter is strongly recommended. The city ranks #162 out of 177 cities tested in Utah.
What contaminants are in Duchesne's water?
Lead was measured at 1.8 ppb (90th percentile). 198 violations are on record.
How is Duchesne'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 Duchesne?
Based on current data, basic filtration should suffice for additional peace of mind.
Where does Duchesne's water come from?
Duchesne's water is sourced from Purchased surface water. The city has 6 water systems serving approximately 5,991 residents.
What health violations has Duchesne's water system had?
Duchesne has 8 health-based violations on record. The most recent violation was recorded in October 2025. Health-based violations mean the water exceeded EPA maximum contaminant levels (MCLs) for a regulated substance. 44 violations remain unresolved.
How does Duchesne's water compare to other cities?
Duchesne ranks #162 out of 177 cities in Utah (better than 8% of state cities) and #14530 out of 15744 cities nationally (8th percentile). The grade of F reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.