Water Monitoring Programs

Ensuring safe drinking water quality for water systems that serve the public

Water systems that serve the public are routinely monitored to ensure safe drinking water quality. For more information about the county’s water monitoring programs or to report concerns, contact the SMCHD Environmental Health Division at smchd.env@maryland.gov or call 301-475-4321.

Beach Monitoring

Public Swimming Pools

Non-Community Water Supply Monitoring

As part of an agreement with the Maryland Department of the Environment, SMCHD monitors public water systems, which are defined as transient non-community (TNC) water systems. A TNC is typically a non-residential business or facility that serves a minimum of 25 individuals daily, at least 60 days per year. Examples of TNC water systems include those in restaurants, churches, and park facilities.

The drinking water quality of a TNC water system is routinely monitored for coliform bacteria and nitrate-nitrite nitrogen. When coliform bacteria is indicated in a water sample result, repeat water quality monitoring occurs until the TNC is found to be free of coliform bacteria. In addition to routine drinking water quality monitoring, a periodic review of the on-site facility occurs to evaluate factors that may affect drinking water quality.

Well Certification Program

The Well Certification Program certifies the potability of all residential drinking water wells, both for new construction and for replacing existing wells. For more information, click here.

Public Water Monitoring Program

The Metropolitan Commission is the local authority on community public water supply and public wastewater conveyance and treatment systems. For further information, visit the St. Mary’s County Metropolitan Commission’s website.