Is Yellowstone Nt, WY Tap Water Safe to Drink?
Graded C, with 4 unresolved violations on record. See what was cited — and what it means for your tap. What to do next ↓
62.1/100
waterverge.com Yellowstone Nt, WY — Water Quality Report
Yellowstone Nt's drinking water received a grade of C (62.1 out of 100), indicating fair water quality. The city's 1 water system serves approximately 5,925 residents using groundwater.
Lead levels were measured at 11.0 ppb (90th percentile), which is within EPA limits but above recommended levels. This system has not yet been tested for PFAS under the EPA UCMR 5 program.
The system has 38 violations on record, including 2 health-based violations. 4 remain unresolved.
What to know about Yellowstone Nt's water
Yellowstone Nt ranks #44 out of 65 cities in Wyoming for water quality, placing it below average in the state.
Yellowstone Nt 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.
While lead levels are within EPA limits, they are above the recommended 5 ppb threshold that health organizations consider ideal. A point-of-use filter adds an extra layer of protection.
The system has seen 33 violations in the past five years, suggesting a pattern of compliance challenges that residents should monitor closely.
Water quality score
See methodology →Is Yellowstone Nt, WY water safe to drink?
Yellowstone Nt's drinking water has significant quality concerns based on EPA testing data. With a grade of C (62.1/100), the system has issues across multiple categories. A water filter is recommended for all residents. The city's 1 water system serves approximately 5,925 residents using groundwater (wells).
Recent water quality updates for Yellowstone Nt
A timeline of significant water quality events, violations, and data updates.
Latest EPA compliance and testing data incorporated into Yellowstone Nt's water quality assessment. Grade: C (62.1/100).
Contaminants: TTHM, Total Haloacetic Acids (HAA5), Lead and Copper Rule.
Contaminants: Lead and Copper Rule.
Contaminants: Pentachlorophenol, 2,4-D, Dalapon.
Federal disaster declaration (FEMA DR-557). Flood event — may have impacted local water infrastructure.
Key contaminant findings
Based on the most recent EPA sampling data for Yellowstone Nt's water supply.
Within EPA limits but above the American Academy of Pediatrics recommended level of 1 ppb. An NSF 53-certified filter provides additional protection.
Violation history
Yellowstone Nt's water system has 38 total violations on record, including 2 health-based violations. 4 remain unresolved. 33 violations were issued in the last 5 years.
Flood & environmental risk
Campbell County has experienced 1 federally declared disaster since 1978. 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 Yellowstone Nt's water come from?
Yellowstone Nt's drinking water comes from groundwater (wells), supplied by 1 water system serving approximately 5,925 people. Groundwater is generally less susceptible to surface contamination but can contain naturally occurring contaminants like arsenic, radon, and nitrate.
What Yellowstone Nt residents can do
Recommended: NSF-certified water filter. This addresses the specific contaminants found in Yellowstone Nt'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
Drought conditions
D2 — severe droughtTeton 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.
Flood & disaster history
Campbell County has experienced 1 federally declared disaster since 1978. Flooding and severe weather can compromise water treatment infrastructure and introduce contaminants into drinking water supplies.
Recommended water filters
Based on contaminants detected in Yellowstone Nt'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. | 11.0 | 15 | ppb | Inorganic | Near Limit |
Lead level trend (90th percentile)
See how Yellowstone Nt compares by contaminant
Explore where Yellowstone Nt ranks among all Wyoming cities for specific contaminants.
Water source & infrastructure
Where Yellowstone Nt's water comes from
Yellowstone Nt'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 federal ownership and serves approximately 5,925 people through 1 water system.
Water systems serving Yellowstone Nt
| System Name | PWSID | Population | Source |
|---|---|---|---|
| YNP - LAKE VILLAGE | WY5680079 | 5,925 | GW |
How Yellowstone Nt compares
Full Wyoming rankings →Yellowstone Nt's score of 62.1/100 is above the average of 55/100 among major Wyoming cities. It outscores 6 of 10 nearby cities.
Nearby cities
View Wyoming rankings →Learn more about your water
Guides and resources related to Yellowstone Nt's water quality findings.
Explore water quality across Teton
Frequently asked questions
Is Yellowstone Nt, WY tap water safe to drink?
Yellowstone Nt's water quality earned a grade of C (62.1/100). Some concerns have been identified. Consider a water filter for an extra layer of protection. The city ranks #44 out of 65 cities tested in Wyoming.
What contaminants are in Yellowstone Nt's water?
Lead was measured at 11.0 ppb (90th percentile). 38 violations are on record.
How is Yellowstone Nt'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 Yellowstone Nt?
While lead levels are within EPA limits, a filter adds extra protection. Based on current data, basic filtration should suffice for additional peace of mind.
Where does Yellowstone Nt's water come from?
Yellowstone Nt's water is sourced from Groundwater. The city has 1 water system serving approximately 5,925 residents.
What health violations has Yellowstone Nt's water system had?
Yellowstone Nt has 2 health-based violations on record. The most recent violation was recorded in January 2024. Health-based violations mean the water exceeded EPA maximum contaminant levels (MCLs) for a regulated substance. 4 violations remain unresolved.
Is Yellowstone Nt's groundwater at risk of contamination?
Yellowstone Nt 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 38 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 Yellowstone Nt's water compare to other cities?
Yellowstone Nt ranks #44 out of 65 cities in Wyoming (better than 32% of state cities) and #11915 out of 15744 cities nationally (24th percentile). The grade of C reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.