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. Author manuscript; available in PMC: 2020 Jun 5.
Published in final edited form as: J Int Soc Respir Prot. 2020;36(1):36–51.

Summary of Inhalation and Exhalation Resistance and Filtration Performance Results for Stockpiled Respirators from Ten Facilities

Facility Results
Inhalation and Exhalation Resistance Participate Filtration Performance
Facility 1, DHHS region 2 All 24 stockpiled respirators from 3 different models passed these tests All 320 stockpiled respirators from 3 different models passed this test
Facility 2, DHHS region 2 All 21 stockpiled respirators from 2 different models passed these tests All 280 stockpiled respirators from 2 different models passed this test
Facility 3, DHHS region 4 All 18 stockpiled respirators from 2 different models passed these tests Out of 240 stockpiled respirators, 2 individual respirators tested (same model, 2 different lots) exceeded the 5.0% maximum allowable penetration. A statistically significant difference was observed between controls (i.e., new respirators of the same model) and each of these two stockpiled lots
Facility 4, DHHS region 9 All 39 stockpiled respirators from 6 different models passed these tests Out of 535 stockpiled respirators, 34 individual respirators (same model, 2 different lots) exceeded the 5.0% maximum allowable penetration. A statistically significant difference was observed between controls and stockpiled respirators for this lot
Facility 5, DHHS region 9 All 42 stockpiled respirators from 6 different models passed these tests All 560 stockpiled respirators from 6 different models passed this test
Facility 6, DHHS region 10 All 27 stockpiled respirators from 4 different models passed these tests All 360 stockpiled respirators from 4 different models passed this test
Facility 7, DHHS region 1 All 39 stockpiled respirators from 6 different models passed these tests Out of 520 stockpiled respirators, 40 individual respirators (same model, same lot) exceeded the 5.0% maximum allowable penetration. A statistically significant difference between the controls and stockpiled respirators was observed for this lot with the 40 failing units (Table III, Stockpile 7)
Facility 8, DHHS region 8 All 24 stockpiled respirators from 5 different models passed these tests All 320 stockpiled respirators from 5 different models passed this test
Facility 9, DHHS region 8 All 12 stockpiled respirators from 2 different models passed these tests All 160 stockpiled respirators from 2 different models passed this test
Facility 10, DHHS region 6 All 30 stockpiled respirators from 5 different models passed these tests All 400 stockpiled respirators from 5 different models passed this test