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Sewer Service Charge

This is an annual user fee billed on the July 1 Property Tax bill. It is assessed to recover the cost of treatment and transportation of wastewater. These charges are authorized by the Baltimore County Code 2015, Article 20 and the Executive Order (PDF).

Every property connected to the Metro District sewer system, which has a separate property tax identification number, will be charged based on the volume of water consumed during the prior calendar year, January 1 to December 31, as reported by Baltimore City Bureau of Water and Wastewater. Properties with private wells and properties where a master water meter serves multiple properties, such as condominiums, may be charged based on plumbing fixture rates.

This charge can only be removed upon receipt of a permit that shows the property connection to the sewer system has been capped off.

How Charges are Computed

Most properties are charged based on the volume of water used. Your water bill shows the number of units used in a quarterly period. A unit equals 100 cubic feet of water, or 748 gallons. Rates vary based on the property type.

Issues That Affect Water Usage

Running toilets, dripping faucets or leaking pipes could be some of the causes of higher water use.

Since the water flows down the sewer, leaking toilets don't necessarily leave any signs of a leak until you get the bill. The average leaky toilet can waste about 200 gallons of water per day. That's over 72,000 gallons a year (over $192 on your water bill and $615 in sewer service costs for a residential customer) for just one leaking toilet. The United States Geologic Survey (USGS) provides an interesting drip calculator to help you see how much water a dripping faucet wastes.

Property owners are urged to review their quarterly water bills from Baltimore City. If your water bill starts to look higher than normal, one of these issues may be the cause. We have provided some information to help show how much water is used and some examples on how to conserve your usage.

Revised July 13, 2022         


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