Resources for Londonderry
Permittee-specific resources created to assist Londonderry in completing MS4 permit requirements.
Appendix H
Chloride:
Hot Spot Mapping Data
- Pollutant Load Summary Spreadsheet
- Prioritized Load Summary Spreadsheet
- Priority Ranked Parcel Summary Report
- Inventory and Priority Ranking Spreadsheet
Industrial Facilities
Water Quality Data
MS4 Regulated Area Map
Hot Spots Guidance
Hot Spots Guidance
Learn how to use the permittee-specific spreadsheets with this workshop: "Using Hot Spot Data and Reports for MS4 Compliance Workshop" (November 19, 2021):
Salt Buffer Zone Maps
Find the 500-foot salt buffer zone maps at the bottom of our Winter Maintenance page.