Table 1.

USGS monitoring site characteristics are shown below. The state/metro area, latitude, longitude, USGS site number, and monitoring duration are all listed. Rock Creek, Sligo Creek, Scotts Level Branch, Herring Run, and Jones Falls were sampled bi-weekly. Accotink Creek data were obtained from a USGS gauge station. Tidally influenced sites are denoted with a *. All sites were located within the United States of America.

Study Site	State/Metro Area	Latitude	Longitude	USGS Site Number	NLCD 2016 Impervious Surface Cover %	Monitoring Duration
Rock Creek	Washington DC	38°57′36.6″	77°02′31.4″	1648010	18.35	19 October 2017–23 June 2021
Sligo Creek	Washington DC	38°59′10.4″	77°00′17.5″	1650800	27.19	4 October 2017–23 June 2021
Scotts Level Branch	Baltimore MD	39°21′41.7″	76°45′42.3″	1589290	22.24	4 October 2017–15 April 2021
Herring Run	Baltimore MD	39°19′04.7″	76°33′18.5″	1585219	32.76	26 October 2017–3 January 2019
Jones Falls *	Baltimore MD	39°17′02.8″	76°36′13.1″	1589485	21.28	1 November 2017–6 November 2019
Accotink Creek	VA	38°48′46″	77°13′43″	1654000	23.4	5 February 2015–1 Januray 2023