Environmental

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Bridge over river The Ada County Highway District is committed to reducing impacts to the environment from right-of-way development and maintenance activities. ACHD develops and implements procedures and programs to comply with federal, state, and local environmental regulations. Please expand the information blocks below for quick access to important information.

Stormwater Pollution Hotline - 208-395-8888

The Stormwater Pollution Hotline is a 24/7 answering service available for reporting illegal discharges and illegal connections to public streets and storm drain system. Read our Stormwater Pollution Hotline fact sheet for additional information.
Want to help? Make sure you know how to properly handle household hazardous waste where you live and work. Start with our Household Hazardous Waste Video!

Remember...ONLY RAIN IN THE STORM DRAIN!

Stormwater Education, Outreach, and Involvement

Did you know? The storm drain system in Ada County is directly

connected to ground water and surface waters like the Boise River.
Stormwater awareness and taking appropriate actions to reduce stormwater pollution is everyone's job and is essential to protect the health of our local waterways.
Visit the Stormwater Education and Outreach webpage for more information and learn how you can help protect the storm drain system and downstream waterways where you live.

Construction Site Stormwater Discharge Control

Did you know? Spill Kit

Ada County has been considered one of the fastest growing communities in the United States since 2017.
Planning, preparedness, and diligence are necessary to mitigate stormwater runoff from construction activities. Projects that impact Ada County right-of-way are subject to permitting and inspection.
To learn more about the types of construction site stormwater plans and best management practices, please visit the Construction Site Discharge Control Program webpage.

Green Stormwater Infrastructure

Green Stormwater Infrastructure (GSI) mimics the natural environment using plants and soils to capture stormwater runoff from the street, prevent flooding, and remove pollutants. Examples of GSI would be vegetated stormwater basins and permeable pavers. GSI is a priority consideration on all ACHD projects.
To learn more about GSI and see some of ACHD’s GSI installations, please visit the Green Stormwater Infrastructure webpage.

Stormwater Documents and Resources

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