Learn the Issues
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Frequent Questions - Ozone and Your Patients' Health
Frequent Questions- Ozone and Your Patients' Health- information for counseling patients about ozone, asthma, and respiratory symptoms.
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The WaterSense Current: Winter 2020
The WaterSense Current is a quarterly update dedicated to news and events related to WaterSense.
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Technical Data and Reports on Nitrogen Dioxide Measurements and SIP Status
EPA collects data from the states and regions on their air quality and state implementation plan (SIP) progress. This information is compiled in a database, and used to create reports, trend charts, and maps.
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October 19-20, 2016 Meeting of the Human Studies Review Board
Agenda, schedule, phone line, web link, and other supporting documents for the HSRB's meeting on October 19-20, 2016.
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The WaterSense Current: Fall 2020
The WaterSense Current is a quarterly update dedicated to news and events related to WaterSense.
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Tools and Resources
There is a wide variety of EPA-produced tools and external resources available to address air quality in your country.
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The WaterSense Current: Summer 2020
The WaterSense Current is a quarterly update dedicated to news and events related to WaterSense.
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The WaterSense Current: Summer 2019
The WaterSense Current is a quarterly update dedicated to news and events related to WaterSense.
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Landscape Photo Gallery
Water-smart landscapes can be beautiful and water-efficient. Check out landscapes from across the country for design inspiration.
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Preparing For Your Drinking Water Sanitary Survey
Preparing For Your Drinking Water Sanitary Survey includes an overview and step-by-step instructions on how to prepare for a drinking water sanitary survey.
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Massachusetts - 2017 Annual Network Plan
Network plan provides framework for establishment and maintenance of air quality surveillance system for the state of Massachusetts.
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April 27, 2017 Meeting of the Human Studies Review Board
Materials to support the HSRB meeting on April 27, 2017: includes meeting agenda and a background paper on mosquito repellent testing.
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CSAPR Compliance Year 2018 NUSA NODAs
This page contains links to NUSA Notices of Data Availability for the CSAPR 2016 compliance year.
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Air Modeling - Observational Meteorological Data
Observed meteorological data for use in air quality modeling consist of physical parameters that are measured directly by instrumentation, and include temperature, dew point, wind direction, wind speed, cloud cover, cloud layer(s), ceiling height,
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Air Modeling - Meteorological Grid Models
For air quality modeling purposes, meteorological grid models are used in conjunction with chemical interaction models to provide gridded output of chemical species or pollutant data.
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CSAPR Compliance Year 2023 NUSA NODAs
This page contains links to NUSA Notices of Data Availability for the CSAPR 2023 compliance year.
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Air Quality Model Clearinghouse
The Model Clearinghouse is a focal point for interpretation of modeling guidance in specific regulatory applications.
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How's My Waterway January 2023 Webcast
Learn about the new features of How's My Waterway.
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Analysis of the Proposed Supplemental Interstate Transport Rule
IPM analyses of the Proposed Supplemental Interstate Transport Rule
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Ozone Layer Research and Technical Resources
Access information on research and technical resources related to ozone layer science. This page provides links to research efforts led by organizations such as the National Oceanic and Atmospheric Administration, the United Nations Environment Program, an