• Indian Creek Spring

    Angie Point

  • Main Street 2007

    Jan Boles

  • Indepnedence Day 2016

    Kids on Parade

  • Historic Caldwell Home

    Jan Boles

  • Cardboard Kayak Race

    Ken Wien

  • Winter Wonderland

    Jan Boles 11-26-17

  • Winter Wonderland Lights

    Michelle Chadd 2017


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Annual MS4 Reports

2016-2017: City of Caldwell 8th Annual Report

2015-2016: City of Caldwell 7th Annual Report

2014-2015: City of Caldwell 6th Annual Report

2013-2014: City of Caldwell 5th Annual Report

2012-2013: City of Caldwell 4th Annual Report

2011-2012: City of Caldwell 3rd Annual Report

2010-2011: City of Caldwell 2nd Annual Report

2009-2010: City of Caldwell 1st Annual Report

Permit     Modified start date letter

Note: Appendices for past Annual MS4 Reports are available upon request.  Please email the stormwater personnel at the bottom of this page.

Municipal Stormwater Management Manual

The City of Caldwell will consider revisions to the current Caldwell Municipal Stormwater Management Manual.  An open house will be held in 2017 for the public to offer input on proposed changes.  

Public Education

The City of Caldwell has joined with Boise City, Garden City, Boise State University , Ada County Highway District, Ada County Drainage District No.3  and Idaho Transportation Department, District 3  in Partners for Clean Water to have a regional outreach to our public education program.


  • Boise RiverSweep - The City of Caldwell participates in an annual cleanup of Boise River as it flows through Caldwell.  See cleanup below for this year's effort.
  • Watershed Watch! - Individuals, families and groups can take part in the watershed-wide effort to collect water quality data along the shores of the Boise River, ponds, reservoirs and creeks. The event takes place in the fall at various sites from Lucky Peak to Parma.
  • Storm Drain Stenciling - Storm drain stenciling projects are coordinated in Caldwell depending on annual requirements.  Any information on upcoming projects will be placed here.

Thank you to all who participated in Boise RiverSweep and Watershed Watch in September 2017!

Illicit Discharge

Public citizens can report an illicit discharge to the City storm drain by contacting Ashley Newbry via the methods at the bottom of this page.   Alternately, you may write to our office at the following address: 621 Cleveland Blvd, Caldwell, ID 83605.  Before you call, please verify that the discharge is illicit by reading the Storm Water Ordinances.


The City of Caldwell inspection staff inspect the onsite implementation of Storm Water Pollution Prevention Plans (SWPPP), as well as the original report submittal to EPA.  Please contact EPA to file your project notice of intent (NOI).

Caldwell Industrial Airport

Caldwell Industrial Airport  SWPPP

Storm Water Contacts

Two engineers run the City Storm Water Management Program.  Their contact information is here:

Ashley Newbry, PE

208-455-4672 | anewbry@cityofcaldwell.org

Sajonara Tipuric, PE

208-455-4679 | stipuric@cityofcaldwell.org

Boise River Sweep 2017

Updated on 03/02/2018 9:05 AM

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