Is Belt, MT Tap Water Safe to Drink?
Graded B+, with 15 unresolved violations on record. See what was cited — and what it means for your tap. What to do next ↓
83.8/100
waterverge.com Belt, MT — Water Quality Report
Belt's drinking water received a grade of B+ (83.8 out of 100), indicating good water quality. The city's 3 water systems serve approximately 745 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 49 violations on record, including 10 health-based violations. 15 remain unresolved.
What to know about Belt's water
Belt ranks #24 out of 115 cities in Montana for water quality, placing it above average in the state.
Belt 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, Belt may have fewer resources for advanced treatment technologies and infrastructure upgrades compared to larger utilities.
Water quality score
See methodology →Is Belt, MT water safe to drink?
Belt's drinking water has significant quality concerns based on EPA testing data. With a grade of B+ (83.8/100), the system has issues across multiple categories. A water filter is recommended for all residents. The city's 3 water systems serve approximately 745 residents using groundwater (wells).
Recent water quality updates for Belt
A timeline of significant water quality events, violations, and data updates.
Latest EPA compliance and testing data incorporated into Belt's water quality assessment. Grade: B+ (83.8/100).
Contaminants: Revised Total Coliform Rule.
Contaminants: E. COLI.
Contaminants: Consumer Confidence Rule.
Federal disaster declaration (FEMA DR-3253). Hurricane event — may have impacted local water infrastructure.
Federal disaster declaration (FEMA DR-640). Flood event — may have impacted local water infrastructure.
Key contaminant findings
Based on the most recent EPA sampling data for Belt's water supply.
Well within EPA limits.
Violation history
Belt's water system has 49 total violations on record, including 10 health-based violations. 15 remain unresolved. 3 violations were issued in the last 5 years.
Flood & environmental risk
Cascade County has experienced 3 federally declared disasters since 1975. 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 Belt's water come from?
Belt's drinking water comes from groundwater (wells), supplied by 3 water systems serving approximately 745 people. Groundwater is generally less susceptible to surface contamination but can contain naturally occurring contaminants like arsenic, radon, and nitrate.
What Belt residents can do
Recommended: NSF-certified water filter. This addresses the specific contaminants found in Belt'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.
Belt'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 droughtCascade 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
Cascade County has experienced 3 federally declared disasters since 1975. 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. | 0.0 | 15 | ppb | Inorganic | Safe |
Lead level trend (90th percentile)
See how Belt compares by contaminant
Explore where Belt ranks among all Montana cities for specific contaminants.
Water source & infrastructure
Where Belt's water comes from
Belt'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 745 people through 3 water systems.
Water systems serving Belt
| System Name | PWSID | Population | Source |
|---|---|---|---|
| BELT TOWN OF | MT0000138 | 600 | GW |
| PLEASANT VALLEY COLONY | MT0003304 | 120 | GW |
| RICEVILLE HEIGHTS SUBDIVISION | MT0004238 | 25 | GW |
How Belt compares
Full Montana rankings →Belt's score of 83.8/100 is above the average of 45/100 among major Montana cities. It outscores 10 of 10 nearby cities.
Nearby cities
View Montana rankings →About Belt, MT
Learn more about your water
Guides and resources related to Belt's water quality findings.
Explore water quality across Cascade
Frequently asked questions
Is Belt, MT tap water safe to drink?
Belt's water quality earned a grade of B+ (83.8/100). The water generally meets EPA standards and is considered safe for consumption. The city ranks #24 out of 115 cities tested in Montana.
What contaminants are in Belt's water?
Lead was measured at 0.0 ppb (90th percentile). 49 violations are on record.
How is Belt'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 Belt?
Based on current data, basic filtration should suffice for additional peace of mind.
Where does Belt's water come from?
Belt's water is sourced from Groundwater. The city has 3 water systems serving approximately 745 residents.
What health violations has Belt's water system had?
Belt has 10 health-based violations on record. The most recent violation was recorded in October 2024. Health-based violations mean the water exceeded EPA maximum contaminant levels (MCLs) for a regulated substance. 15 violations remain unresolved.
Is Belt's groundwater at risk of contamination?
Belt 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 49 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 Belt's water compare to other cities?
Belt ranks #24 out of 115 cities in Montana (better than 79% of state cities) and #6281 out of 15744 cities nationally (60th percentile). The grade of B+ reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.