(4) Monitoring for coastal waters The Administrator shall design and deploy atmospheric deposition monitoring networks for coastal waters and their watersheds and shall make any information collected through such networks available to the public. As part of this effort, the Administrator shall conduct research to develop and improve deposition monitoring methods, and to determine the relative contribution of atmospheric pollutants to pollutant loadings. For purposes of this subsection, “coastal waters” shall mean estuaries selected pursuant to section 320(a)(2)(A) of the Federal Water Pollution Control Act [ 33 U.S.C. 1330(a)(2)(A) ] or listed pursuant to section 320(a)(2)(B) of such Act [ 33 U.S.C. 1330(a)(2)(B) ] or estuarine research reserves designated pursuant to section 1461 of title 16 .