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Regional Contacts for Stack Test Method Issues or Other Stack Test Questions

For regional contacts on questions concerning Clean Air Act National Stack Testing Guidance, select your state or territory from this list or from the map below.

 Connecticut, Maine, Massachusetts, New Hampshire, Rhode Island, Vermont New Jersey, New York, Puerto Rico, US Virgin Islands Delaware, District of Columbia, Maryland, Pennsylvania, Virginia, West Virginia Alabama, Florida, Georgia, Kentucky, Mississippi, North Carolina, South Carolina, Tennessee  Illinois, Indiana, Michigan, Minnesota, Ohio, Wisconsin Arkansas, Louisiana, New Mexico, Oklahoma, Texas Iowa, Kansas, Missouri, Nebraska Colorado, Montana, North Dakota, South Dakota, Utah, Wyoming Arizona, California, Hawaii, Nevada, Pacific Islands Alaska, Idaho, Oregon, WashingtonMap of the EPA Regions

Region/State Contact
Region 1 (CT, MA, ME, NH, RI, VT) Bill Osbahr (
(617) 918-8289

Nicholas Bobbs (
(617) 918-8382
Region 2 (NJ, NY, PR, VI) Kai Tang (
(732) 321-4364
Region 3 (DE, DC, MD, PA, VA, WV) Stafford Stewart (
(215) 814-5352
Region 4 (AL, FL, GA, KY, MS, NC, SC, TN) Dave McNeal (
(404) 562-9102
Region 5 (IL, IN, MI, MN, OH, WI) Dakota Prentice (
Region 6 (AR, LA, NM, OK, TX) Diana Lundelius (
(214) 665-7468
Region 7 (IA, KS, MO, NE) Scott Postma (
(913) 551-7048
Region 8 (CO, MT, ND, SD, UT, WY) Michael Stovern (
(303) 312-6635
Region 9 (AS, AZ, CA, GU, HI, MP, NV, Trust Territories) Scott Connolly (
(415) 947-4141
Region 10 (AK, ID, OR, WA) Zach Hedgpeth (
(206) 553-1217

The EPA Air Emission Measurement Center (EMC)

EMC provides information on test methods for measuring pollutants from smokestacks and other industrial sources. This website compiles the test methods available for emission measurement. Contact EMC staff for technical assistance in the use and application of the methods.