Science & Technology
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WhAEM2000 BBM Files - Glenwood Springs, Colorado
WhAEM2000 (Wellhead Analytic Element Model) binary base map browser for Glenwood Springs Quadrangle, Colorado. Files serve as geographic basis for groundwater modeling.
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WhAEM2000 BBM Files - Fort Morgan, Colorado
WhAEM2000 (Wellhead Analytic Element Model) binary base map browser for Fort Morgan Quadrangle, Colorado. Files serve as geographic basis for groundwater modeling.
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WhAEM2000 BBM Files - Durango, Colorado
WhAEM2000 (Wellhead Analytic Element Model) binary base map browser for Durango Quadrangle, Colorado. Files serve as geographic basis for groundwater modeling.
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Basic Information: Pathogen Equivalency Committee
Basic Information for Pathogen Equivalency Committee
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Equivalency Criteria
Equivalency criteria for Pathogen Equivalency Committee
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A Plain English Guide to the EPA Part 503 Biosolids Rule
This guidance document is not a substitute for the actual rule, but it is intended as a helpful tool for interpretation and implementation of the rule.
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Aquatic Life Criteria - Aluminum
Aquatic Life Criteria for Atrazine
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Fish and Shellfish Program Newsletter - 2023
Fish and Shellfish Program Newsletter - 2023
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Municipal Nutrient Removal Technologies Reference Document
This report is a reference document on recent advances in nutrient removal technology and practices.
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Human Health Toxicity Assessment for Perfluorooctane Sulfonic Acid (PFOS)
The Environmental Protection Agency has finalized the human health toxicity assessment for Perfluorooctane Sulfonic Acid (PFOS) and related salts.
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Human Health Toxicity Assessment for Perfluorooctanoic Acid (PFOA)
The Environmental Protection Agency has finalized the human health toxicity assessment for Perfluorooctanoic Acid (PFOA) and related salts.
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Local Greenhouse Gas Inventory Tool
Use EPA's Local Greenhouse Gas Inventory Tool to evaluate community greenhouse gas emissions and compile a local- or municipal-level GHG inventory.
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Tribal Greenhouse Gas Inventory Tool
Use EPA's Tribal Greenhouse Gas Inventory Tool to compile a GHG inventory for your entire tribe or for tribal government operations, and to calculate emissions from many sectors.
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Lead (Pb) Standards - Integrated Science Assessments from Current Review
Scientific and technical Integrated Science Assessments used to develop the current lead national ambient air quality standard.
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Revised Ozone HREA Chapter 7 Appendix Tables, Sasser, May 2014 Memo
On May 1, 2014, members of the Clean Air Scientific Advisory Committee’s Ozone Review Panel requested EPA provide revised appendix tables associated with the recently corrected Chapter 7
epidemiological-based risk results. -
Indicators: Human Disturbance
Human disturbance is a measure of the vulnerability of aquatic resources to a variety of harmful human activities such as tree removal, road building, construction near shorelines/streambanks, and artificial hardening of lakeshores with retaining walls.
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Indicators: Lakeshore Habitat/Riparian Vegetative Cover
Riparian and lakeshore vegetative cover consist of the vegetation corridor alongside streams, rivers, and lakes. Vegetative cover refers to overhanging or submerged tree limbs, shrubs, and other plants growing along the shore of the waterbody.
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Indicators: Sediment Toxicity
Phosphorus, like nitrogen, is a critical nutrient required for all life. Phosphate (PO4), which plays major roles in the formation of DNA, cellular energy, and cell membranes (and plant cell walls). Too much phosphorus can create water quality problems.
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Indicators: Sediment Mercury
Sediment mercury is mercury that has become embedded into the bottom substrates of aquatic ecosystems. Mercury is a common pollutant of aquatic ecosystems and it can have a substantial impact on both human and wildlife health.