Okanogan County Treasurer Leah Mc Cormack reminds taxpayers that 2018 second-half property taxes and irrigation assessments are due and must be postmarked by Wednesday, Oct. 31. Interest and penalty will start accruing on Thursday, Nov. 1. If you are mailing your taxes or assessments, send your payment to: Okanogan County Treasurer, P.O. Box 111, Okanogan, WA 98840. If paying by credit card, go to www.okanogancounty.org/Treasurer or call 1-877-737-4772; or for customer service call 1-888-891-6064 and choose option 1. There will be a small convenience fee applied to your credit card payment for this service. Credit/debit cards are not accepted at the counter in the treasurer’s office.