Science & Technology

Chesapeake Bay Watershed Happenings

This page provides updates as to what is going on in the Chesapeake Bay watershed to help restore the Chesapeake Bay.

Air Pollution in the Chesapeake Bay Watershed

This page describes how atmospheric deposition adds to the high levels of nitrogen in the Chesapeake Bay. It also provides an overview of the allocations given to atmospheric deposition.

Technical Support Documents Used to Develop the Chesapeake Bay TMDL

The Chesapeake Bay TMDL development was supported by several technical documents for water quality standards and allocation methodologies specific to the Chesapeake Bay. This page provides the technical support documents.

Chesapeake Bay TMDL 2012-2013 Milestones for Pennsylvania

This page provides the 2012-2013 programmatic milestones for Pennsylvania. These milestones are a part of the Chesapeake Bay TMDL and aim to help restoration of the Chesapeake Bay.

Checklist for Quality Concerns About Using Data from Other Sources

A step-by-step guide to ensure that secondary data is used in an appropriate manner.

Ensuring Results in the Chesapeake Bay

This page shows how EPA is ensuring that progress is made in cleaning up the Chesapeake Bay and local waters.

Comments incorporated by reference into the Information Quality Act Request for Correction

Select comments to Science Advisory Board incorporated by reference into Information Quality Act Request for Correciton

Exhibit A of the Request for Correction Regarding "Drinking Water: Regulatory Determination on Perchlorate" (RFC 12004)

EPA Request for Correction 12004 (Exhibit A): A review of perchorlate occurrence in public drinking water systems

EPA Request for Correction 12004 (Exhibit E1)

EPA Request for Correction 12004 (Exhibit E1)
California Department of Health: Annual Compliance Report 2009

RFC 18003 - EtO EPA Response; issued 12/18/2019

Final response letter to Mr. William P. Gulledge on behalf of the Ethylene Oxide Panel for RFC 18003

Hoja Informativa del Sitio Superfund Omaha Lead, Omaha, Condado de Douglas, Nebraska, Junio de 2024

Actualización de la revisión del sitio cada cinco años

Washington County Lead District National Priority List (NPL) Superfund Sites, Washington County, Missouri – Fact Sheet, July 2022

Proposed Plans for Drinking Water Wells – Public Comment Opportunity and Public Meetings

Economic Analysis Models/Tools for Air Pollution Regulations

Description of economic models and tools used by OAQPS

Federal Guidance Report No. 15: External Exposure to Radionuclides in Air, Water and Soil

FGR 15 updates the 1993 Federal Guidance Report No. 12 (FGR 12), External Exposure to Radionuclides in Air, Water, and Soil. FGR 15 incorporates advances in radiation protection science regarding how organ/tissue doses change with age and sex.

Federal Register Notices for National Drinking Water Advisory Council (NDWAC) Lead and Copper Rule Working Group (LCRWG) Meetings

The NDWAC Lead and Copper Rule Working Group was formed to provide advice to EPA in considering Long-Term Revisions to the Lead and Copper Rule. This page contains the notices announcing the group meetings.