Liquid Waste Haulers

Many hauled or trucked liquid wastes are concentrated and could negatively impact the treatment plant or cause pass through if discharged directly into MRWPCA's headwords intake. Therefore the Agency has a liquid waste receiving facility where loads are accepted under strict requirements (pH, toxicity, etc.). Discharged liquid wastes are slowly bled by batches into the influent waste stream so as not to cause treatment works upset.

MRWPCA accepts liquid waste from permitted haulers. Accepted sources include: chemical toilets; septage; restaurant grease; biocell (oily waste); certain special wastes (storm drain pump outs; corn starch dye; wine waste; vegetable waste: artichoke and grape pulp); and salt brine solutions. Submission of a completed load manifest is required prior to discharge of any load.

Important hauler information (PDFs):

Liquid Waste Receiving Hours

Monday – Friday 7:00am – 4:00pm Normal Hours
4:00pm – 10:00pm Special Arrangement
10:00pm – 7:00am Prior Authorization or Emergency*
Saturday 8:00am – 4:00pm Normal Hours
4:00pm – 8:00am Prior Authorization or Emergency*
Sunday Closed Prior Authorization or Emergency*
* For emergency incidents we request that you call the Regional Wastewater Treatment Plant Control Room at (831) 883-6166 as soon as possible and explain the circumstances and the need to dispose during these "other" hours.


Chemical Toilets and Septic Tanks $0.04 per gallon discharged
Oily Wastes, Grease, and Special Loads $0.11 per gallon discharged
Permit Fee $100.00 billed annually
Binder (Deposit) Fee $1,000 due at opening of account (refundable upon closure of account)
* As of July 1, 2013