About the Division
The Environmental Monitoring and Analytical Services (EMAS) Division is comprised of three separate Programs. These Programs support many functions of the Agency including biological monitoring and laboratory services.
The three Programs of the Environmental Monitoring and Analytical Services (EMAS) Division
- Monitoring
- Analytical Services and Laboratory
- Permits and Watershed Management
Guam Integrated Report
The Clean Water Act (CWA) requires states to identify waters that do not or are not expected to meet applicable water quality standards with current pollution control technologies alone.
Since 1992, EPA has issued program guidance on the 303(d) listing and reporting process to help states prepare and submit to CWA section 303(d) reports. In 2002 U.S EPA encouraged states to merge the 305(b) report and the 303(d) report. States are allowed to report on all their assessed water under section 305(b) and the list of those that are impaired in a single integrated report. Integrated Report Guidance (IRG) is issued biennially to support states in making listing decisions and reporting on the conditions of their waters:
- 2020 Guam Integrated Report
- Appendix A: Marine and Surface Water Monitoring and Assessment Methodology
- Appendix B: Tables
- Appendix C: Parameters Tables
- 2022-2024 Guam Integrated Report:
- Part I
- Part II
- Part III
- Appendix A: Marine and Surface Water Monitoring Assessment Methodology
- 2022-2024 303(d) List of Impaired Waters
- Inventory of Wetlands
- Inventory of Rivers Streams
- Inventory of Marine Bays
- Inventory of Coastal Waters
- Appendix B: Tables
- Appendix C: Parameters Tables
Guam Water Quality Standards (GWQS)
Water quality standards (WQS) are provisions of state, territorial, authorized tribal or federal law approved by EPA that describe the desired condition of a water body and the means by which that condition will be protected or achieved. Water bodies can be used for purposes such as recreation (e.g. swimming and boating), scenic enjoyment, and fishing, and are the home to many aquatic organisms. To protect human health and aquatic life in these waters, states, territories and authorized tribes establish WQS. WQS form a legal basis for controlling pollutants entering the waters of the United States.
Guam Water Quality Standards (2017 Revision)
The original publication of Guam Water Quality Standards was made on February 5, 1975. Revisions were filed with the Legislative Secretary on April 14, 1984. Amended by P.L. 26-032 (August 10, 2001) and P.L. 26-113 (June 18, 2002). Pursuant to the Administrative Adjudication Law amendments were filed with the Guam Legislature on October 18, 2017, and became effective ninety days thereafter due to legislative inaction. USEPA approved the GWQS (2017 Revision) on March 7, 2018.