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Important for you to know:

  • New to WDFN: see current water conditions throughout the state using the new State Pages. Filter by continuous data type and age of data, view latest values, and link to graphing options to explore the data further. To learn more, read our announcement on the Water Data for the Nation blog.
Important Legacy real-time page

USGS Parameter Group Data Types Start Date End Date
Biological Water-quality 2004-07-23 2004-07-23
Information Water-quality 1953-10-18 2020-10-27
Inorganics, Major, Metals Water-quality 1953-10-18 1954-04-13
Inorganics, Major, Non-metals Water-quality 1953-10-18 2020-10-27
Inorganics, Minor, metals Water-quality 1953-10-18 1954-04-13
Nutrient Water-quality 1953-10-18 2014-04-22
Organics, PFAS Water-quality 2020-08-18 2020-10-27
Physical Daily Values, Unit Values, Water-quality 1941-07-11 2024-11-21
Sediment Water-quality 1967-04-21 1974-03-14
n/a Peak Measurements 1942-03-19 2023-03-15
n/a Site Visits 1948-03-18 2024-09-16
n/a USGS Annual Water Data Reports Site 2005-01-01 2023-01-01
Water Data for the Nation inventory

Monitoring location 01097000 is associated with a Stream in Middlesex County, Massachusetts. Current conditions of Discharge and Gage height are available. Water data back to 1941 are available online.

Metadata Element Location Metadata Metadata Code
Agency
U.S. Geological Survey USGS
Site identification number
01097000 n/a
Site name
ASSABET RIVER AT MAYNARD, MA n/a
Site type
Stream
ST
DMS latitude 422555 n/a
DMS longitude 0712701 n/a
Decimal latitude 42.432038 n/a
Decimal longitude -71.4497848 n/a
Latitude-longitude method
Interpolated from MAP. M
Latitude-longitude accuracy
Accurate to + or - 1 sec. S
Latitude-longitude datum
North American Datum of 1927 NAD27
Decimal Latitude-longitude datum North American Datum of 1983 NAD83
District
Massachusetts 25
State
Massachusetts 25
County
Middlesex County 017
Country US n/a
Land net location description n/a
Name of location map MAYNARD, MA n/a
Scale of location map 24000 n/a
Altitude of Gage/land surface 146 feet n/a
Method altitude determined Interpolated from Digital Elevation Model N
Altitude accuracy 4.3 feet n/a
Altitude datum
North American Vertical Datum of 1988 NAVD88
Subbasin hydrologic unit
Concord 01070005
Drainage basin
n/a
Topographic setting
Stream channel
C
Flags for instruments at site YNYNYNNNNYNNNYNNNNNNNNNNNNNNNN n/a
Date of first construction
n/a
Date site established or inventoried n/a
Drainage area
116 square miles n/a
Contributing drainage area 116 square miles n/a
Time Zone abbreviation EST n/a
Site honors Daylight Saving Time
Y n/a
Data reliability
n/a
Data-other GW files NNNNNNNN n/a
National aquifer n/a
Local aquifer n/a
Local aquifer type
n/a
Well depth n/a
Hole depth
n/a
Source of depth data n/a
Project number 442500100 n/a