| #D001 | | nonpoint source (NPS) pollution | Polluted stormwater runoff, also known as nonpoint source (NPS) pollution, is a leading cause of harmful impacts to the coastal environment. | medium |
| #D002 | | Low Impact Development (LID) | a Low Impact Development (LID) approach to stormwater management that aims to replicate the site’s natural hydrologic balance. | medium |
| #D003 | | Critical Coastal Area (CCA) | This online GIS-based map viewer shows the location & boundaries of each Critical Coastal Area (CCA) | low |
| #D004 | | Total Maximum Daily Load (TMDL) | polluted (impaired) waterways & Total Maximum Daily Load (TMDL) plans to reduce pollutants | low |
| #D005 | | State Nonpoint Source Pollution Control Program (State NPS Program) | Addresses federal requirements to manage polluted runoff under both the Clean Water Act and the Coastal Zone Management Act. | medium |
| #D006 | | FCS | Petroleum Fuel Contaminated Soils | high |
| #D007 | | CalEPA | California Environmental Protection Agency | high |
| #D008 | | SWRCB | State Water Resources Control Board | high |
| #D009 | | Basin Plan | Water Quality Control Plan for the San Diego Basin | high |
| #D010 | | TMDLs | Total Maximum Daily Loads | high |
| #D011 | | CEQA | California Environmental Quality Act | high |
| #D012 | | WERs | Water Effect Ratios | high |
| #D013 | | OAL | Office of Administrative Law | high |
| #D014 | | USEPA | US Environmental Protection Agency | high |
| #D015 | | State Water Board | State Water Resources Control Board | high |
| #D016 | | Agricultural Operations | agricultural and nursery operations | high |
| #D017 | | General Agricultural Orders | Order No. R9-2016-0004 (Third-Party General Order) and Order No. R9-2016-0005 (Individual General Order) | high |
| #D018 | | Commercial Agricultural Operations | any agricultural business or trade activity, including farms, nurseries, and orchards, that produce crops or ornamental plants with the intent to make a profit. | high |
| #D019 | | WQPP | Water Quality Protection Plans | high |
| #D020 | | BMPs | best management practices | high |
| #D021 | | Third-Party General Order | Order No. R9-2016-0004 | high |
| #D022 | | Individual General Order | Order No. R9-2016-0005 | high |
| #D023 | | BMP | Best Management Practice | high |
| #D024 | | CSO | Combined Sewer Overflow | high |
| #D025 | | LID | Low Impact Development | high |
| #D026 | | OGS | Oil/Grit Separator | high |
| #D027 | | TSS | Total Suspended Solids | high |
| #D028 | | Arterial Road | A road primarily for through traffic. | high |
| #D029 | | Base Flow | The portion of stream flow that is not due to storm runoff and is supported by groundwater seepage into a channel. | high |
| #D030 | | City | The City of Toronto | high |
| #D031 | | Development | a) The construction, reconstruction, erection or placing of a building or structure of any kind, b) Any change to a building or structure that would have the effect of altering the use or potential use of the building or structure, increasing the size of the building or structure or increasing the number of dwelling units in the building or structure, c) Site grading, d) The temporary or permanent placing, dumping or removal of any material, originating on the site or elsewhere. | high |
| #D032 | | First Flush | The delivery of a disproportionately large load of pollutants during the early part of storms due to the rapid runoff of accumulated pollutants. | high |
| #D033 | | Major Drainage System | That storm drainage system which carries the total runoff of the system less the runoff carried by the minor system (storm sewer). | high |
| #D034 | | Minor Drainage System | That storm drainage system which is frequently used for transporting, and disposing of snowmelt, miscellaneous minor flows, storm runoff up to the capacity of the system. | high |
| #D035 | | Wet Weather Flow | Stormwater runoff generated by either rainfall or snowmelt or flow resulting from sanitary wastewater that enters the combined sewer system; infiltration and inflows from foundation drains or other drains resulting from rainfall or snowmelt. | high |