Is Mountain View, WY Tap Water Safe to Drink?
Graded A-, with 5 unresolved violations on record. See what was cited — and what it means for your tap. What to do next ↓
87.8/100
waterverge.com Mountain View, WY — Water Quality Report
Mountain View's drinking water received a grade of A- (87.8 out of 100), indicating good water quality. The city's 1 water system serves approximately 1,250 residents using purchased surface water.
Lead levels were measured at 3.0 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 18 violations on record, including 1 health-based violation. 5 remain unresolved.
What to know about Mountain View's water
Mountain View ranks #15 out of 65 cities in Wyoming for water quality, placing it above average 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.
Haloacetic acid (HAA5) levels were elevated at 34.8 µg/L in UCMR 4 testing, though below the 60 µg/L EPA limit. Activated carbon filtration can help reduce these disinfection byproducts.
As a small community water system, Mountain View may have fewer resources for advanced treatment technologies and infrastructure upgrades compared to larger utilities.
Water quality score
See methodology →Is Mountain View, WY water safe to drink?
Mountain View's drinking water has significant quality concerns based on EPA testing data. With a grade of A- (87.8/100), the system has issues across multiple categories. A water filter is recommended for all residents. The city's 1 water system serves approximately 1,250 residents using surface water (rivers, lakes, or reservoirs).
Recent water quality updates for Mountain View
A timeline of significant water quality events, violations, and data updates.
Latest EPA compliance and testing data incorporated into Mountain View's water quality assessment. Grade: A- (87.8/100).
Contaminants: Surface Water Treatment Rule.
Contaminants: Revised Total Coliform Rule, Surface Water Treatment Rule.
1 health-based. Contaminants: Lead and Copper Rule, Total Haloacetic Acids (HAA5).
Key contaminant findings
Based on the most recent EPA sampling data for Mountain View's water supply.
Well within EPA limits.
Violation history
Mountain View's water system has 18 total violations on record, including 1 health-based violation. 5 remain unresolved. 3 violations were issued in the last 5 years.
Where does Mountain View's water come from?
Mountain View's drinking water comes from surface water (rivers, lakes, or reservoirs), supplied by 1 water system serving approximately 1,250 people. Surface water sources are more susceptible to contamination from runoff, industrial discharge, and algal blooms, requiring extensive treatment. Nearby water bodies include Blacks Fork Above Smiths Fork, Near Lyman (river).
What Mountain View residents can do
Recommended: NSF-certified water filter. This addresses the specific contaminants found in Mountain View'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.
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 Mountain View
Industrial polluters nearby
Reported releases to surface water by facilities near Mountain View, ranked by pounds discharged annually.
| Facility | Top chemical | To surface water (lbs/yr) | Distance |
|---|---|---|---|
KNIFE RIVER CASPER CASPER, WY82601 | — | — | 6.0 mi |
CUSTOM FIBERGLASS INC CASPER, WY82604 | — | — | 1.1 mi |
HF SINCLAIR CASPER REFINING LLC CASPER, WY82609 | — | — | 8.7 mi |
KNIFE RIVER MATERIALS YARD CASPER, WY82604 | — | — | 1.3 mi |
TALLGRASS MIDSTREAM LLC - CASPER GAS PLANT & COMPRESSOR STAT CASPER, WY82609 | — | — | 8.8 mi |
Source: EPA Toxic Release Inventory (TRI) 2023
Drought conditions
D2 — severe droughtUinta County is currently in D2 (severe 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.
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. | 3.0 | 15 | ppb | Inorganic | Safe |
Lead level trend (90th percentile)
See how Mountain View compares by contaminant
Explore where Mountain View ranks among all Wyoming cities for specific contaminants.
Water source & infrastructure
Where Mountain View's water comes from
Mountain View'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 1,250 people through 1 water system.
Water bodies near Mountain View
Mountain View is located near 1 notable water body. As a surface water system, these water bodies may directly influence the city's drinking water supply.
Water systems serving Mountain View
| System Name | PWSID | Population | Source |
|---|---|---|---|
| MOUNTAIN VIEW, TOWN OF | WY5600847 | 1,250 | SWP |
How Mountain View compares
Full Wyoming rankings →Mountain View's score of 87.8/100 is above the average of 55/100 among major Wyoming cities. It outscores 10 of 10 nearby cities.
Nearby cities
View Wyoming rankings →About Mountain View, WY
Learn more about your water
Guides and resources related to Mountain View's water quality findings.
Explore water quality across Uinta
Frequently asked questions
Is Mountain View, WY tap water safe to drink?
Mountain View's water quality earned a grade of A- (87.8/100). The water generally meets EPA standards and is considered safe for consumption. The city ranks #15 out of 65 cities tested in Wyoming.
What contaminants are in Mountain View's water?
Lead was measured at 3.0 ppb (90th percentile). 18 violations are on record.
How is Mountain View'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 Mountain View?
Based on current data, basic filtration should suffice for additional peace of mind.
Where does Mountain View's water come from?
Mountain View's water is sourced from Purchased surface water. The city has 1 water system serving approximately 1,250 residents.
What health violations has Mountain View's water system had?
Mountain View has 1 health-based violation on record. The most recent violation was recorded in October 2023. Health-based violations mean the water exceeded EPA maximum contaminant levels (MCLs) for a regulated substance. 5 violations remain unresolved.
How does Mountain View's water compare to other cities?
Mountain View ranks #15 out of 65 cities in Wyoming (better than 77% of state cities) and #3833 out of 15744 cities nationally (76th percentile). The grade of A- reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.
Does Mountain View's small water system affect quality?
Mountain View's system serves approximately 1,250 residents. Small community water systems (under 3,300 people) may have fewer financial resources for infrastructure upgrades and advanced treatment technologies. However, they are held to the same EPA drinking water standards as larger systems. This system has 18 violations on record.