25 CFR § 171.525
How do I pay my bill?
February 24, 2021
(a) You can pay your bill by:
(1) Personally going to the local office of the irrigation facility authorized to receive your payment during normal business hours;
(2) Depositing your payment in an authorized drop box, if available, at the local office of the irrigation facility; or
(3) Mailing your payment to the address indicated on your bill.
(b) Your payment must be in the form of:
(1) Check or money order in the mail or authorized drop box; or
(2) Cash, check, or money order if you pay in person.