Is Troy, MT Tap Water Safe to Drink?
Graded B+, with 14 unresolved violations on record. See what was cited — and what it means for your tap. What to do next ↓
80.5/100
waterverge.com Troy, MT — Water Quality Report
Troy's drinking water received a grade of B+ (80.5 out of 100), indicating good water quality. The city's 4 water systems serve approximately 2,508 residents using groundwater.
Lead levels were measured at 2.0 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 102 violations on record, including 6 health-based violations. 14 remain unresolved.
What to know about Troy's water
Troy ranks #36 out of 115 cities in Montana for water quality, placing it mid-range in the state.
Troy 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.
As a small community water system, Troy may have fewer resources for advanced treatment technologies and infrastructure upgrades compared to larger utilities.
Water quality score
See methodology →Is Troy, MT water safe to drink?
Troy's drinking water has significant quality concerns based on EPA testing data. With a grade of B+ (80.5/100), the system has issues across multiple categories. A water filter is recommended for all residents. The city's 4 water systems serve approximately 2,508 residents using groundwater (wells).
Recent water quality updates for Troy
A timeline of significant water quality events, violations, and data updates.
Latest EPA compliance and testing data incorporated into Troy's water quality assessment. Grade: B+ (80.5/100).
Federal disaster declaration (FEMA DR-3630). Flood event — may have impacted local water infrastructure.
1 health-based. Contaminants: Consumer Confidence Rule, Revised Total Coliform Rule.
Contaminants: Revised Total Coliform Rule.
Contaminants: E. COLI.
Federal disaster declaration (FEMA DR-3253). Hurricane event — may have impacted local water infrastructure.
Key contaminant findings
Based on the most recent EPA sampling data for Troy's water supply.
Well within EPA limits.
Violation history
Troy's water system has 102 total violations on record, including 6 health-based violations. 14 remain unresolved.
Flood & environmental risk
Lincoln County has experienced 3 federally declared disasters since 1974. 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 Yaak River Near Troy.
Where does Troy's water come from?
Troy's drinking water comes from groundwater (wells), supplied by 4 water systems serving approximately 2,508 people. Groundwater is generally less susceptible to surface contamination but can contain naturally occurring contaminants like arsenic, radon, and nitrate. Nearby water bodies include Yaak River Near Troy (river).
What Troy residents can do
Recommended: NSF-certified water filter. This addresses the specific contaminants found in Troy'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.
Troy'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
Flood & disaster history
Lincoln County has experienced 3 federally declared disasters since 1974. 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. | 2.0 | 15 | ppb | Inorganic | Safe |
Lead level trend (90th percentile)
See how Troy compares by contaminant
Explore where Troy ranks among all Montana cities for specific contaminants.
Water source & infrastructure
Where Troy's water comes from
Troy'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 2,508 people through 4 water systems.
Water bodies near Troy
Troy is located near 1 notable water body. These water bodies contribute to the regional watershed and may indirectly affect groundwater quality.
Water systems serving Troy
| System Name | PWSID | Population | Source |
|---|---|---|---|
| TROY CITY OF | MT0000348 | 2,100 | GW |
| WILDERNESS PLATEAU WATER AND SEWER DIST | MT0002985 | 208 | GW |
| ANGEL ISLAND SUBDIVISION | MT0000582 | 150 | GW |
| TURNING WINDS | MT0004486 | 50 | GW |
How Troy compares
Full Montana rankings →Troy's score of 80.5/100 is above the average of 45/100 among major Montana cities. It outscores 9 of 10 nearby cities.
Nearby cities
View Montana rankings →About Troy, MT
Wikipedia →Troy is a city in Lincoln County, Montana, United States. The population was 797 at the 2020 census. It lies at the lowest elevation of any settlement in Montana. The town is on U.S. Route 2, near Montana Highway 56, in the Kootenai River gorge by the Kootenai National Forest.
Learn more about your water
Guides and resources related to Troy's water quality findings.
Explore water quality across Lincoln
Frequently asked questions
Is Troy, MT tap water safe to drink?
Troy's water quality earned a grade of B+ (80.5/100). The water generally meets EPA standards and is considered safe for consumption. The city ranks #36 out of 115 cities tested in Montana.
What contaminants are in Troy's water?
Lead was measured at 2.0 ppb (90th percentile). 102 violations are on record.
How is Troy'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 Troy?
Based on current data, basic filtration should suffice for additional peace of mind.
Where does Troy's water come from?
Troy's water is sourced from Groundwater. The city has 4 water systems serving approximately 2,508 residents.
What health violations has Troy's water system had?
Troy has 6 health-based violations on record. The most recent violation was recorded in July 2020. Health-based violations mean the water exceeded EPA maximum contaminant levels (MCLs) for a regulated substance. 14 violations remain unresolved.
Is Troy's groundwater at risk of contamination?
Troy 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 102 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 Troy's water compare to other cities?
Troy ranks #36 out of 115 cities in Montana (better than 69% of state cities) and #7838 out of 15744 cities nationally (50th percentile). The grade of B+ reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.