Water Rates

New Rates in Effect July 1, 2017



At a public hearing on May 16, 2017, MMWD’s Board of Directors approved changes to water service rates effective July 1, 2017. The changes will be reflected in water bills issued on or after September 1, 2017. The exact charges vary among customer classes based on levels of water usage and meter sizes. Use the links at left to find current rate tables for your customer class. Learn more about the 2017 rate increase.

What Your Water Rates Include


MMWD's water rates include a fixed service charge, a fixed watershed management fee, and a per-unit charge, reflecting both fixed costs and costs based on the amount of water used.

The service charge is based on meter size and covers the cost of billing, customer service, meter replacement and repair, meter reading, water conservation, and a portion of general administrative overhead. The watershed management fee is based on the size of your meter and recovers costs related to watershed operations and protection of sensitive habitat. The per-unit charge includes the cost of water production, transmission, treatment, distribution, importing water and recycling water.

How We Calculate Your Bill


A system of four billing tiers is used to charge for the units of water used.  A set number of units of water is allocated for each tier. Customers pay a higher per-unit rate for each additional unit if the water usage increases into the next higher tier. As such, the tier system is designed to encourage water conservation.

MMWD has a two-month billing cycle. Billed amounts are based on meter readings for water used during the previous two months. The billing periods are January/February, March/April, May/June, July/August, September/October, and November/December. To get an idea of when your meter will be read, see our billing area map. We begin the billing cycle in Area 1 and finish in Area 15.

If you have a question about your water bill, please call our Customer Service Department at 415-945-1400. For general water bill questions and payment options, see our customer FAQs.

Note: Single-family residential customers can be billed at the lower Tier 3 rate if they meet specific water conservation criteria and exemption requirements  

*One CCF is one hundred cubic feet or 748 gallons.
**CCFs per living unit.