Python library and web-application for estimating long-term performance of stormwater control measures. Powers multiple web platforms including OC Stormwater Tools, Tacoma Watershed Insights, and San Diego's Green Street Clean Water Plan. Includes functions for runoff quantity/quality, BMP sizing/volume capture, and pollutant load reduction.

Official AQUALIS resources for stormwater, wastewater, and pond management; environmental compliance, maintenance, and best practices.

A tool designed to help municipal stormwater managers implement a stormwater utility fee program that promotes equitable contributions from residential, industrial, and business properties within their community for the maintenance of stormwater infrastructure and costs associated with EPA MS4 permit compliance.