Removing nitrogen from urban stormwater runoff

Oldcastle Infrastructure is seeking technologies to remove nitrogen from urban stormwater runoff.
Nutrient pollution is a widespread and challenging problem in urban stormwater management. Stormwater runoff carries nitrogen and phosphorus from fertilizer, pet waste and other sources to receiving waters where these nutrients can contribute to harmful algal blooms. Existing stormwater treatment technologies, which were developed to target total suspended solids (TSS), total phosphorus, and dissolved metals, do not reduce nitrogen concentrations in a significant way.


We are seeking technologies to remove nitrogen from urban stormwater runoff that can be used in combination with existing treatment methods, like bioretention, biofiltration or filtration.

Our must-have requirements are:

  • Capable of reliably removing at least 50% of total nitrogen from urban stormwater
  • Can be deployed in urban stormwater drainage systems
  • Does not export pollutants, including sediment, phosphorus, or metals

See Full Details & Apply

Agency Name: 
Oldcastle Infrastructure
Contact Name: 
Sola Fasunwon
Grant Amount: 
$40,000 - $75,000, for 6-9 month proof of concept; potential to renew
Grant Location: 
External Deadline: 
Friday, April 30, 2021
Internal Deadline: 
Friday, April 23, 2021
Grant Type: 
Grant Area: 
Natural Science
Grant Eligibility: