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Great Falls Environment Facts

Air Quality, Water Quality, Climate and more


Great Falls
Air Quality
Cascade County
. Good Days Moderate Days Unhealthy for Sensitive Persons Days Unhealthy Days Very Unhealthy Days
2017 295 49 1 0 0
2016 343 13 0 0 0
2015 306 32 3 6 0
2014 270 58 1 1 0
2013 311 26 0 0 0




Great Falls
Water Quality
Upper Missouri - Dearborn & Sun Watersheds
. % Good % Threatened % Impaired
2014 20 0 80
2012 19 0 81
2010 15 0 85
2008 15 0 85
2006 15 0 85
2004 6 0 94
2002 6 0 94




Great Falls
Recreation
. # of Parks # of Parks
(99 City Avg)
National Parks, Historic Sites, etc.
(managed by National Park Service)
Lewis and Clark National Historic Trail 7
National Campgrounds, Lodges, etc.
(other federal agency-managed sites)
10 26
State Parks, Sites, etc. 19 11



Great Falls Climate
(1971-2000)
. . 99 City Avg
January - Avg Low Temp 11 F 27 F
January - Avg Daily Temp 22 F 37 F
July - Avg Daily Temp 66 F 74 F
July - Avg High Temp 82 F 86 F
Avg Annual Precipitation 15 in 35 in



Great Falls Elevation
3,664 feet GPTR 99 City Average
1,652 feet



Great Falls
Natural Hazards
. Risk Level 99 City Average
Total Hazard Risk Lower Moderate
Earthquake 2% 10.9%
Tsunami No Risk No Risk
Hurricane 0 10
Flood Moderate Very High
Tornado Very Low Low
Volcano No Risk No Risk
Wildfire High Low



Great Falls
Man-Made Hazards (Nuclear)
Nuclear Power Stations
(# Reactors)
Distance from City GPTR 99 City
Average
Columbia (1) 360 miles 50% of cities are within 100 miles of at least one nuclear station



Great Falls
Heating and Cooling Degree Days
(avg annual)
. . 99 City Avg
Total Degree Days 8,116 5,915
HDD 7,828 4,662
CDD 288 1,253



EPA Hazardous Material Cleanup Sites
(Great Falls Area)
Great Falls Area EPA Cleanup Sites


Legend:
Small green circles (older style maps) or multi-colored circles (newer style maps: click here for legend) indicate 1)Superfund Sites 2)Federal Facilities 3)RCRA Corrective Action Sites and 4)Brownfields Properties (EPA hazardous material cleanup sites defined at Environment link)

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