Storm Water Mapping


From the US EPA web site:

Phase II MS4s are required to develop a program to detect and eliminate illicit discharges. This primarily includes developing:

  • A storm sewer system map

... click here for the full list:         US EPA    





Clermont County Surface Water


Clermont County Storm Water Conveyance Systems (35Mb)


A Python class to capture a stream network:              (called by               Use this to clean up the stream network prior to running


- Presenting, September 24, 2019 at the 2019 Ohio GIS Conference (near final draft)
      Intermediate Python - Data Structures

- Posting, September 23, 2019 at the 2019 Ohio GIS Conference (Poster contest): CC WWTP SWPPPs

- Presented, September 26, 2018 at the 2018 Ohio GIS Conference
      Building a logical stream network with Python (intermediate Python concepts)

- Presented, September 23, 2015 at the 2015 Ohio GIS Conference
      Water over the Bridge and Other Challenges of NHD Stewardship

- Nice Hydrography FAQ
      National Assessment of Hydrography Data FAQ
      see also: NAHD Benefit Analysis

- Presented, December 11, 2014 at the Cincinnati GIS User's Group
      What I did with Python over the summer

- Presented, May 10, 2013 at the 2013 Ohio Stormwater Conference in Sharonville OH.

- Presented, May 14, 2009 at the 2009 Ohio Stormwater Conference in Mason OH.

- Recently found Google News link.
  No endorsement or trust of Wired is implied, this is just a popular press article on storm water illicit discharge issues:
      Artcle in Wired             (archive)

- Found on ESRI conference site.
      Fulfilling EPA Requirements for Storm Water Mapping Using GIS             (archive)

- From the New York Times:
      As Sewers Fill Waste Poisons Waterways       (archive)



Ohio EPA Surface Water Department


US EPA NPDES main page

Surf your watershed