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    Well Data

     

    Monthly Index Well Data

    As a service to Cape officials, engineers and other interested parties, the Cape Cod Commission publishes monthly data about water levels at groundwater observation wells on Cape Cod. The data provide current information for the effective siting of septic systems and provide historical context for fluctuations in the regional water table in current assessments. Historical records on selected wells extend back to the 1950s.

    The water level measurements shown below are taken monthly from United States Geological Survey (USGS) observation wells. They are compiled during the last week of each month and are published as soon as possible thereafter.

    Listed below are nine out of the 61 wells measured across Cape Cod by the Commission's Water Resources staff. These nine are employed as index wells to be used with Technical Bulletin 92-001: Estimation of High Groundwater Levels for Construction and Land Use Planning to predict high groundwater levels. Also provided below is a link to USGS national data. See the last column in the table and the footnote below.

    September 2019 (posted 10/04/2019)

    The following table is also available as a downloadable file.

    Location Well No. Water Level
    (feet below land surface)
    USGS Site Number
    (links to USGS national water-level database)
    Barnstable 230 21.22 413956070164301
    Barnstable 247 22.55 414154070165001
    Bourne 198 33.11 --
    Brewster 21 8.11 414518070020301
    Chatham 138R n/a 414100070011101
    Mashpee 29 7.78 413525070291904
    Sandwich 252 n/a 414418070241601
    Sandwich 253 47.74 414124070265901
    Truro 89 11.76* 420206070045901
    Wellfleet 17 10.77 415353069585401

    *provisional

     

    August 2019 (posted 09/18/2019)

    The following table is also available as a downloadable file.

    Location Well No. Water Level
    (feet below land surface)
    USGS Site Number
    (links to USGS national water-level database)
    Barnstable 230 20.86 413956070164301
    Barnstable 247R 22.08 414154070165001
    Bourne 198 32.80 --
    Brewster 21 7.85 414518070020301
    Chatham 138R n/a 414100070011101
    Mashpee 29 7.46 413525070291904
    Sandwich 252 n/a 414418070241601
    Sandwich 253 47.38 414124070265901
    Truro 89 11.62 420206070045901
    Wellfleet 17 10.45 415353069585401

     
    NOTE: USGS national water-level database provides historic data, hydrographs, and site maps.
     


    Page Last Updated October 4, 2019, 11:58 AM


    Past USGS Observation Well Data

     

    Additional Resources:

    Monthly Precipitation and Water Conditions (Data from the Massachusetts Department of Conservation and Recreation)

    Massachusetts Drought Watch (Data from the US Geological Survey)

    Real-time Data from Brewster Groundwater-level Monitoring Well: USGS 414630070014901 MA-BMW 22 BREWSTER, MA (Data from the US Geological Survey)

     

    Related CCC Site:

    Groundwater Levels

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