PDFWAC 173-476-900

Table of standards.

Disclaimer: This table is provided as an overview. See complete rule for more detail.
Pollutant
Averaging Time
Level
Remarks
Measurement Method
Interpretation Method
Particle Pollution
PM-10
24-hour
150 μg/m3
Not to be exceeded more than once per year averaged over 3 years
40 C.F.R. Part 50, Appendix J
40 C.F.R. Part 50, Appendix K
PM-2.5
Annual
12.0 μg/m3
Annual mean, averaged over 3 years
40 C.F.R. Part 50, Appendix L
40 C.F.R. Part 50, Appendix N
24-hour
35 μg/m3
98th percentile, averaged over 3 years
Lead
Rolling 3-month average
0.15 µg/m3
Not to be exceeded
40 C.F.R. Part 50, Appendix G
40 C.F.R. Part 50, Appendix R
Sulfur Dioxide
Annual
0.02 ppmv
Not to be exceeded in a calendar year
40 C.F.R. Part 50, Appendix A-1 or A-2
24-hour
0.14 ppmv
Not to be exceeded more than once per year
3-hour
0.5 ppmv
Not to be exceeded more than once per year
1-hour
75 ppbv
99th percentile of 1-hour daily maximum concentrations, averaged over 3 years
Nitrogen Dioxide
Annual
53 ppbv
Annual Mean
40 C.F.R. Part 50, Appendix F
40 C.F.R. Part 50, Appendix S
1-hour
100 ppbv
98th percentile of 1-hour daily maximum concentrations, averaged over 3 years
Ozone
8-hour
0.070 ppmv
Annual fourth-highest daily maximum 8-hr concentration, averaged over 3 years
40 C.F.R. Part 50, Appendix D
40 C.F.R. Part 50, Appendix U
Carbon Monoxide
8-hour
9 ppmv
Not to be exceeded more than once per year
40 C.F.R. Part 50, Appendix C
1-hour
35 ppmv
[Statutory Authority: RCW 70.94.152, 70.94.331, 70.94.860. WSR 16-12-099 (Order 16-01), § 173-476-900, filed 5/31/16, effective 7/1/16. Statutory Authority: Chapter 70.94 RCW. WSR 13-24-010 (Order 12-05), § 173-476-900, filed 11/21/13, effective 12/22/13.]