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| Boise Air Quality Ada County |
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| . | Good Days | Moderate Days | Unhealthy for Sensitive Persons Days | Unhealthy Days | Very Unhealthy Days |
| 2017 | 182 | 155 | 23 | 3 | 2 |
| 2016 | 218 | 134 | 13 | 1 | 0 |
| 2015 | 268 | 80 | 13 | 4 | 0 |
| 2014 | 321 | 43 | 0 | 1 | 0 |
| 2013 | 293 | 60 | 3 | 0 | 0 |
| Boise Water Quality Lower Boise Watershed |
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| . | % Good | % Threatened | % Impaired |
| 2014 | na | na | na |
| 2012 | 12 | 0 | 88 |
| 2010 | na | na | na |
| 2008 | 0 | 0 | 100 |
| 2006 | na | na | na |
| 2004 | na | na | na |
| 2002 | 4 | 0 | 96 |
| Boise Recreation |
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| . | # of Parks | # of Parks (99 City Avg) |
| National Parks, Historic Sites, etc. (managed by National Park Service) |
Hagerman Fossil Beds National Monument and Minidoka Internment National Monument | 7 |
| National Campgrounds, Lodges, etc. (other federal agency-managed sites) |
52 | 26 |
| State Parks, Sites, etc. | 2 | 11 |
| Boise Climate (1971-2000) |
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| . | . | 99 City Avg | January - Avg Low Temp | 22 F | 27 F |
| January - Avg Daily Temp | 29 F | 37 F |
| July - Avg Daily Temp | 72 F | 74 F |
| July - Avg High Temp | 88 F | 86 F |
| Avg Annual Precipitation | 19 in | 35 in |
| Boise Elevation | |
| 3,885 feet | GPTR 99 City Average 1,652 feet |
| Boise Natural Hazards |
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| . | Risk Level | 99 City Average |
| Total Hazard Risk | Moderate | Moderate |
| Earthquake | 8% | 10.9% |
| Tsunami | No Risk | No Risk |
| Hurricane | 0 | 10 |
| Flood | Low | Very High |
| Tornado | Very Low | Low |
| Volcano | Low Ash Fall | No Risk |
| Wildfire | High | Low |
| Boise Man-Made Hazards (Nuclear) |
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| Nuclear Power Stations (# Reactors) |
Distance from City | GPTR 99 City Average |
| Columbia (1) | 245 miles | 50% of cities are within 100 miles of at least one nuclear station |
| Boise Heating and Cooling Degree Days (avg annual) |
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| . | . | 99 City Avg |
| Total Degree Days | 6,973 | 5,915 |
| HDD | 6,325 | 4,662 |
| CDD | 648 | 1,253 |
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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| Aspen has Similar Geography & Climate | Durango has Similar Geography & Climate | Olympia is also a State Capital | Vail has Similar Geography & Climate |
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