Analyzing Water Quality Data from the US Geological Survey

Here is the direct link to the USGS:

https://nrtwq.usgs.gov/

Here is the direct link for the data in MD:
waterdata.usgs.gov/md/nwis/dv?referred_module=qw&county_cd=24001&county_cd=24
003&county_cd=24005&county_cd=24009&county_cd=24011&county_cd=24013&county_cd
=24015&county_cd=24017&county_cd=24019&county_cd=24021&county_cd=24023&county
_cd=24025&county_cd=24027&county_cd=24029&county_cd=24031&county_cd=24033&cou
nty_cd=24035&county_cd=24037&county_cd=24039&county_cd=24041&county_cd=24043&
county_cd=24045&county_cd=24047&county_cd=24510&site_tp_cd=OC&site_tp_cd=OCCO&site_tp_cd=ST&site_tp_cd=ST-CA&site_tp_cd=ST-DCH&site_tp_cd=STTS&index_pmcode_00300=1&group_key=NONE&sitefile_output_format=html_table&column
_name=agency_cd&column_name=site_no&column_name=station_nm&range_selection=date_r
ange&begin_date=2010-04-04&end_date=2020-04-02&format=gif&date_format=YYYY-MMDD&rdb_compression=file&list_of_search_criteria=county_cd%2Csite_tp_cd%2Crealtime_par
ameter_selection

This link provides a map of land use in MD:

https://www.researchgate.net/figure/Land-use-map-of-Maryland-based-on-the-Federal-Region-III-National-Land-Cover-NLCD_fig1_10708264