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| County | Site | Units | Max | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Ada | Garden City | µg/m³ | 12.4 | 12 | 12.2 | 12.3 | 12.4 | 12.4 | 12.3 | 7.7 | 7.5 | 7.2 | 7 | 6.8 | |||||||||||||
| Ada | Meridian | µg/m³ | 9 | 9 | 8.8 | 8.7 | 8.8 | 8.7 | 8.9 | 8.7 | 8.5 | 8.2 | 8 | 7.8 | |||||||||||||
| Bannock | Pocatello | µg/m³ | 6 | 5.9 | 5.8 | 5.8 | 5.8 | 5.9 | 6 | 6 | 6 | 5.8 | 5.8 | 5.8 | |||||||||||||
| Benewah | Plummer - Coeur d'Alene Tribe | µg/m³ | 5.9 | 5.7 | 5.9 | 5.5 | 5.4 | 5.1 | 4.8 | 4.9 | 4.3 | 4.9 | 5 | 4.5 | |||||||||||||
| Benewah | St. Maries | µg/m³ | 3.7 | 3.7 | 3.5 | 3.6 | 3.6 | 3.3 | 3.4 | 3.4 | 3.5 | 3.4 | 3.5 | ||||||||||||||
| Blaine | Ketchum | µg/m³ | 3.4 | 3.4 | 3.2 | 3.2 | 3.2 | 3.1 | 3.2 | 3.2 | 3.2 | 3.2 | 3.4 | 3.4 | |||||||||||||
| Boise | Garden Valley | µg/m³ | 7.5 | 7.2 | 7.1 | 6.9 | 7 | 7 | 7 | 7.1 | 7.2 | 7.4 | 7.3 | 7.5 | |||||||||||||
| Boise | Idaho City | µg/m³ | 6.7 | 6.2 | 6.2 | 6.4 | 6.4 | 6.4 | 6.5 | 6.7 | 6.7 | 6.7 | 6.7 | 6.7 | |||||||||||||
| Bonner | Sandpoint | µg/m³ | 3.6 | 3.6 | 3.5 | 3.2 | 2.9 | 2.7 | 2.7 | 2.7 | 2.9 | 2.9 | 2.9 | ||||||||||||||
| Bonneville | Idaho Falls | µg/m³ | 4.6 | 4.2 | 4.3 | 4.2 | 4.2 | 4.3 | 4.3 | 4.2 | 4.5 | 4.6 | 4.6 | 4.5 | |||||||||||||
| Boundary | Bonners Ferry | µg/m³ | 3 | 2.9 | 3 | 2.8 | 2.7 | 2.7 | 2.7 | 2.6 | 2.6 | 2.6 | 2.9 | ||||||||||||||
| Boundary | Mt Hall | µg/m³ | 2.5 | 2.5 | 2.4 | 2.4 | 2.3 | 2.2 | 2.3 | 2.1 | 1.9 | 1.9 | 1.7 | ||||||||||||||
| Boundary | Porthill | µg/m³ | 4.9 | 4.6 | 4.6 | 4.9 | 4.6 | 4.5 | 4.5 | 4.4 | 3.9 | 3.6 | 3.3 | ||||||||||||||
| Canyon | Nampa | µg/m³ | 6.9 | 6.9 | 6.8 | 6.9 | 6.7 | 6.5 | 6.5 | 6.4 | 6.1 | 5.9 | 6.1 | 6.2 | |||||||||||||
| Caribou | Soda Springs | µg/m³ | 4.6 | 4.3 | 4.3 | 4.4 | 4.4 | 4.4 | 4.5 | 4.5 | 4.5 | 4.5 | 4.6 | 4.6 | |||||||||||||
| Clearwater | Orofino - Nez Perce Tribe | µg/m³ | 4.5 | 4.5 | 4.5 | 4.3 | 4.2 | 4.4 | 4.2 | 4.4 | 4.2 | 4.2 | 4.3 | ||||||||||||||
| Franklin | Preston | µg/m³ | 2.8 | 2.8 | 2.6 | 2.5 | 2.4 | 2.5 | 2.4 | 2.3 | 2.3 | 2.2 | 2.3 | 2.5 | |||||||||||||
| Idaho | Cottonwood | µg/m³ | 4.5 | 4.3 | 4.3 | 4.2 | 4.3 | 4.2 | 4.1 | 3.9 | 4 | 4.2 | 4.5 | ||||||||||||||
| Idaho | Grangeville | µg/m³ | 2.6 | 2.2 | 2.3 | 2.5 | 2.5 | 2.5 | 2.5 | 2.6 | 2.4 | 2.5 | 2.6 | ||||||||||||||
| Kootenai | Coeur d'Alene | µg/m³ | 3 | 3 | 3 | 2.9 | 2.8 | 2.7 | 2.7 | 2.5 | 2.4 | 2.4 | 2.6 | ||||||||||||||
| Latah | Juliaetta | µg/m³ | 2.5 | 2.4 | 2.5 | 2.4 | 2.2 | 2.1 | 2.2 | 2.2 | 2.1 | 2.1 | 2.3 | ||||||||||||||
| Latah | Moscow | µg/m³ | 5.6 | 5.4 | 5.3 | 5 | 5 | 5 | 5.2 | 5.2 | 5.3 | 5.4 | 5.6 | ||||||||||||||
| Latah | Potlatch | µg/m³ | 4 | 3 | 3.1 | 3.3 | 3.5 | 3.6 | 3.7 | 4 | 3.7 | 3.9 | 3.8 | ||||||||||||||
| Lemhi | Salmon | µg/m³ | 5.6 | 5.1 | 5.2 | 5.3 | 5.4 | 5.4 | 5.5 | 5.6 | 5.5 | 5.4 | 5.5 | 5.5 | |||||||||||||
| Lewis | Nezperce - Nez Perce Tribe | µg/m³ | 3.2 | 2.8 | 2.8 | 2.6 | 3 | 2.6 | 2.5 | 2.6 | 3 | 3 | 3.2 | ||||||||||||||
| Lewis | Reubens - Nez Perce Tribe | µg/m³ | 25.6 | 24.1 | 24.3 | 24.3 | 24.5 | 24.3 | 24.2 | 25.2 | 25.6 | 25.5 | 25.4 | ||||||||||||||
| Lewis/Idaho | Kamiah - Nez Perce Tribe | µg/m³ | 3.1 | 3 | 3.1 | 3 | 3 | 2.9 | 3 | 2.9 | 2.9 | 2.6 | 2.6 | ||||||||||||||
| Madison | Rexburg | µg/m³ | 7.3 | 7.3 | 7.3 | 7.3 | 7.2 | 7.1 | 7.1 | 7.2 | 7.2 | 7.3 | 7.3 | 7.3 | |||||||||||||
| Minidoka | Paul | µg/m³ | 7.9 | 7.3 | 7.3 | 7.4 | 7.4 | 7.4 | 7.5 | 7.6 | 7.7 | 7.7 | 7.8 | 7.9 | |||||||||||||
| Nez Perce | Lapwai - Nez Perce Tribe | µg/m³ | 2.7 | 2.2 | 2.3 | 2.4 | 2.4 | 2.6 | 2.6 | 2.7 | 2.4 | 2.3 | 2.3 | ||||||||||||||
| Nez Perce | Lewiston | µg/m³ | 5.3 | 5 | 4.8 | 4.8 | 4.9 | 5 | 5 | 4.8 | 4.8 | 5.1 | 5.3 | ||||||||||||||
| Shoshone | Pinehurst | µg/m³ | 4.8 | 4.4 | 4.4 | 4.5 | 4.6 | 4.5 | 4.5 | 4.4 | 4.7 | 4.8 | 4.8 | ||||||||||||||
| Twin Falls | Twin Falls | µg/m³ | 5.8 | 5.1 | 5.1 | 5.3 | 5.3 | 5.4 | 5.5 | 5.6 | 5.8 | 5.7 | 5.6 | 5.3 | |||||||||||||
| Valley | McCall | µg/m³ | 6.3 | 6.3 | 6.1 | 6.1 | 6.3 | 6.2 | 6.1 | 6 | 5.9 | 5.8 | 5.8 | 5.9 | |||||||||||||
| Washington | Weiser | µg/m³ | 9.4 | 9.4 | 9.3 | 9.2 | 9.1 | 9 | 8.9 | 8.8 | 8.6 | 8.5 |
