Calculating credits for stormwater and rainwater harvest and use/reuse
This page will be developed in Winter, 2016
| Recommended pollutant removal efficiencies, in percent, for infiltration BMPs. Sources. TSS=total suspended solids; TP=total phosphorus; PP=particulate phosphorus; DP=dissolved phosphorus; TN=total nitrogen | |||||||
| TSS | TP | PP | DP | TN | Metals | Bacteria | Hydrocarbons |
| Pollutant removal is 100 percent for the volume that is captured and infiltrated | |||||||
Credit refers to the quantity of stormwater or pollutant reduction achieved either by an individual Best Management Practice (BMP) or cumulatively with multiple BMPs. Stormwater credits are a tool for local stormwater authorities who are interested in
- providing incentives to site developers to encourage the preservation of natural areas and the reduction of the volume of stormwater runoff being conveyed to a best management practice (BMP);
- complying with permit requirements, including antidegradation (see [1]; [2]);
- meeting the MIDS performance goal; or
- meeting or complying with water quality objectives, including Total Maximum Daily Load (TMDL) Wasteload Allocations (WLAs).
This page provides a discussion of how infiltration practices can achieve stormwater credits. Infiltration practices include infiltration basins, infiltration trenches (including dry wells), and underground infiltration systems. The discussion does not include bioinfiltration and permeable pavement systems, unless specifically mentioned. To view the credit articles for other BMPs, see the Related pages section.
Related pages
- Overview for stormwater and rainwater harvest and use/reuse
- Design criteria for stormwater and rainwater harvest and use/reuse
- Construction specifications for stormwater and rainwater harvest and use/reuse
- Operation and maintenance for stormwater and rainwater harvest and use/reuse
- Water quality considerations for stormwater and rainwater harvest and use/reuse
- Environmental concerns for stormwater and rainwater harvest and use/reuse
- Cost-benefit considerations for stormwater and rainwater harvest and use/reuse
- Case studies for stormwater and rainwater harvest and use/reuse
- Calculating credits for stormwater and rainwater harvest and use/reuse
- Definitions for stormwater and rainwater harvest and use/reuse
- Requirements, recommendations and information for using Harvest and re-use/cistern as a BMP in the MIDS calculator
- Links for stormwater and rainwater harvest and use/reuse
- References for stormwater and rainwater harvest and use/reuse
- Technical support for stormwater and rainwater harvest and use/reuse