The City of Falls Church operates and maintains the sewer system. As a cost-saving measure and convenience for our customers, Fairfax Water provides sewer billing service for the city, which is why your sanitary sewer fees are included with your water bill.
For residential customers, sewer usage is based on winter-quarter water consumption or the actual water consumption during the current billing period, whichever is lower. This prevents residential customers from being charged sewer rates on water used outdoors during the warmer months, because it does not drain to the sanitary sewer system.
The City of Falls Church prorates this amount on initial and final bills based on average winter-quarter consumption.
Commercial customers' sewer use is based on actual water consumption. Some commercial customers use meters to separately measure water that does not drain to the sanitary sewer system, such as water used for irrigation or cooling systems.