Yellowstone Water Quality Report
5 cities ranked · Average grade: C · Montana
Avg Score
63.7
Cities Ranked
5
Health Violations
5
PFAS Detected
2
63.7
County avg score
5
Cities ranked
20%
A or B grade
20%
D or F grade
5
Health violations
2
PFAS detected
Grade Distribution
How Yellowstone cities scored
A
0
0%
Excellent
B
1
20%
Good
C
3
60%
Fair
D
0
0%
Poor
F
1
20%
Failing
Comparison
County vs Montana average
▼ 2.0 pts below state average
City Map
Water quality across Yellowstone
Each dot is a city, colored by grade. Click any city to view its full report.
Highlights
Top & bottom cities in Yellowstone
Worst cities
County context
2
Superfund sites in Yellowstone
59,106
lbs/yr to surface water · top 10 TRI facilities
Industrial pollution
Top industrial polluters in Yellowstone
Industrial polluters nearby
Facilities reporting the most surface-water releases in Yellowstone, 2023.
Total reported releases to surface water: 59,106 lbs
| Facility | Top chemical | To surface water (lbs/yr) |
|---|---|---|
CHS INC. LAUREL REFINERY LAUREL, MT59044 | Nitrate compounds (water dissociable; reportable only when in aqueous solution) | 46,755 |
PAR MONTANA BILLINGS REFINERY BILLINGS, MT59101 | Ammonia | 6,227 |
WESTERN SUGAR COOPERATIVE.130130 BILLINGS, MT59101 | Ammonia | 5,957 |
PHILLIPS 66 CO BILLINGS REFINERY BILLINGS, MT59101 | Phenol | 165 |
JUPITER SULPHUR LLC BILLINGS, MT59101 | Ammonia | 1 |
+ 5 more facilities
Source: EPA Toxic Release Inventory (TRI) 2023
Superfund sites
Superfund sites in Yellowstone
Superfund sites nearby
Federally tracked hazardous-waste sites within Yellowstone on the EPA National Priorities List.
- BILLINGS PCE
- LOCKWOOD SOLVENT GROUND WATER PLUME
Source: EPA Superfund National Priorities List
Full Rankings
All 5 cities in Yellowstone
| # | City | Grade | Score | Score | Population | Violations | Issues |
|---|---|---|---|---|---|---|---|
| 1 | Huntley | B+ | 83.2 | 705 | 75 | Health Unresolved | |
| 2 | Laurel | C+ | 65.3 | 7K | 151 | Health Unresolved | |
| 3 | Ballantine | C+ | 65.2 | 800 | 114 | Health Unresolved | |
| 4 | Ballantine | C+ | 65.2 | 800 | 114 | Health Unresolved | |
| 5 | Billings | F | 39.6 | 143K | 1938 | Health Unresolved |