Pioneer Irrigation District is a non-profit irrigation district providing irrigation water to 34,000+ acres of land in parts of Canyon County and Western Ada County, Idaho.  Established in 1901, Pioneer is proud to be a part of the Treasure Valley's rich agricultural history and we are continually looking for the best ways to manage water needs now and into the future for both agricultural and residential irrigation uses.

For a map of Pioneer Irrigation District, please click here.

Important News Updates


Notice To Control Noxious Weeds - Please read the notice here.

Treasure Valley storage water rights are potentially at stake. Click here to learn about the issue at hand, who is affected, what the status is and how you can help.

Board of Director meetings are typically held on the 7th of each month, unless there is a conflict. They are held at Pioneer's office at 3804 S. Lake Ave. in Caldwell, ID. The next regularly scheduled Board Meeting is June 7, 2023 at 10:00 a.m. and July 7, 2023 at 10 a.m.

Board of Corrections meeting is held in September of every year.

If you would like to be on the agenda to address the Board, please call the District's Secretary/Treasurer at (208) 459-3617.

The Pioneer Irrigation District supplies water to more than 34,000 acres in the Ada and Canyon counties, including acres of agricultural and residential lands. The Pioneer Irrigation District Board of Directors decided on the April 10th startup date for 2023 irrigation season during the Board's March 7th meeting.

For more information about the upcoming water season, or what canal system you may receive your water from, please contact the District office at (208) 459-3617. Your ditchrider may be contacted once water is in the system.

District Map

History of Pioneer Irrigation

pay your bill online

2023 season

To learn the history of Pioneer Irrigation District please click here.


Click here to pay your Pioneer Irrigation bill online!! 

Once the payment processing screen opens, please click the Irrigation Assessments link on the right side and enter the required data  to pay your bill.

Please note there is a convenience fee of 2.95% of the payment amount for credit/debit cards ($1.95 minimum) or $0.95 for electronic checks.  These fees pay for the cost of credit card/EFT processing and do not benefit Pioneer Irrigation District.


Pay-by-phone is available.  You may call the office at 208-459-3617 to pay your bill over the phone (convenience fees noted above do apply). 

We now have available a payment drop box, located at the front door. Accessible when gates are open.