- Northwest Septic Operation & Maintenace is a family owned business which provide fast, friendly, and professional septic service in Bremerton and Silverdale WA. We provide septic services including Septic Tank Cleaning, Septic Pumping, Septic Repairs, Septic Inspections, 247 Septic Emergencies. You can trust our experience and expertise anytime to handle your septic issues. Contact us to know more about our septic services. br br Contact Us br Northwest Septic Operation & Maintenance br 3594 Byron Street Suite 240, br Silverdale, WA 98383 br Phone: 206-842-5111 br info@nwseptic.