020-2 Wyo. Code R. §§ 2-9 - Ambient Standards for Fluorides

(a) The ambient air standards for fluorides, measured as hydrogen fluoride through methods approved by the Administrator are:

(i) Statewide Standard:

Averaging Time	Maximum Allowable Concentration for Averaging Time
12 hours	3.0 µg/m3
24 hours	1.8 µg/m3
7 days	0.5 µg/m3
30 days	0.4 µg/m3

(ii) Regional Standard:

Averaging Time	Maximum Allowable Concentration for Averaging Time
12 hours	10.0 µg/m3
24 hours	4.0 µg/m3
7 days	1.8 µg/m3
30 days	1.2 µg/m3

The Regional Standard applies to the area encompassing the following lands in Sweet water County, Wyoming:

T19N R104W, E1/2 Section 31 & Sections 32, 33, 34, 35, 36;

T19N R103W, Section 31;

T18N R105W, S1/2 Section 1 & Sections 12, 13, 24, 25, 35, 36;

T18N R104W, All Sections 1 through 36;

T18N R103W, Sections 6, 7, 18, 19, 30, 31, 32, 33;

T17N R105W, Sections 1, 2, 11, 12, 13, 14, 23, 24, 25, 26;

T17N R104W, Sections 1 through 30;

T17N R103W, Sections 4, 5, 6, 7, 8, 9, 16, 17, 18, 19, 20, 21, 28, 29, 30

(b) The standards for fluoride in forage for animal consumption measured as fluorine, dry weight basis, are:

Averaging Time	Maximum Allowable Concentration for Averaging Time
One year	30 ppm
60 days	60 ppm
30 days	80 ppm

The concentration of fluoride in forage shall be determined through sampling and analysis methods approved by the Administrator.

Notes

020-2 Wyo. Code R. §§ 2-9

Amended, Eff. 10/13/2015. Amended, Eff. 12/20/2016. Amended, Eff. 2/5/2018. Amended, Eff. 4/30/2024.