Science & Technology
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Donaldson Technology—Series 6100 Diesel Oxidation Catalyst (DOC) & Spiracle Closed Crankcase Filtration system Environmental Technology Verification Logo
This retrofit technology is included on EPA's Verified Technologies List for Clean Diesel.
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Clean Diesel Technologies, Inc. – Purifilter Plus DPF
This retrofit technology is included on EPA's Verified Technologies List for Clean Diesel.
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Clean Diesel Technologies, Inc. – AZC Purimuffler or AZC Purifier Diesel Oxidation Catalyst (DOC)
This retrofit technology is included on EPA's Verified Technologies List for Clean Diesel.
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Caterpillar Technology—Emissions Upgrade Group (model 3306)
This retrofit technology is included on EPA's Verified Technologies List for Clean Diesel.
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Nett Technologies, Inc.—BlueMAX™ 100 Urea-Based Selective Catalytic Reduction (SCR) System
This retrofit technology is included on EPA's Verified Technologies List for Clean Diesel.
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Johnson Matthey Technology—Selective Catalytic Reduction Technology (SCRT)
This retrofit technology is included on EPA's Verified Technologies List for Clean Diesel.
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Johnson Matthey Technology—Selective Catalytic Reduction Technology (SCRT)
This retrofit technology is included on EPA's Verified Technologies List for Clean Diesel.
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Foss Maritime / AKA Technology—XeroPoint Hybrid Tugboat Retrofit System
This retrofit technology is included on EPA's Verified Technologies List for Clean Diesel.
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Pesticide Program Dialogue Committee Meeting May 18-19, 2016
View meeting materials and the transcript of the May 2016 PPDC meeting.
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Endocrine Disruptor Screening Program Tier 1 Battery of Assays
Notice announcing the EDSP Tier 1 battery of assays and availability of test guidelines (protocols) for conducting the assays included in the battery.
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National Results and Regional Highlights - National Lakes Assessment 2012
NLA 2012 Report and Regional Highlights
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Western Mountains Ecoregion - National Lakes Assessment Results
NLA 2012 Results for the Western Mountains ecoregion
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Xeric Ecoregion - National Lakes Assessment Results
NLA 2012 Results for the Xeric ecoregion
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Temperate Plains Ecoregion - National Lakes Assessment Results
NLA 2012 Results for the Temperate Plains ecoregion
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Southern Plains Ecoregion - National Lakes Assessment Results
NLA 2012 Results for the Southern Plains ecoregion
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Southern Appalachians Ecoregion - National Lakes Assessment Results
NLA 2012 Results for the Southern Appalachians ecoregion
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Northern Plains Ecoregion - National Lakes Assessment Results
NLA 2012 Results for the Northern Plains ecoregion
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Northern Appalachians Ecoregion - National Lakes Assessment Results
NLA 2012 Results for the Northern Appalachians ecoregion
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Coastal Plains Ecoregion - National Lakes Assessment Results
NLA 2012 Results for the Coastal Plains ecoregion
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Ecoregional Results - National Lakes Assessment 2022
Results for the National Lakes Assessment 2012, including key findings, national results, ecoregional results, and state highlights.