USGS Water-Year Summary 2024
01111230 BLACKSTONE RIVER AT MILLVILLE, MA
LOCATION - Lat 42°01'22", long 71°34'22" referenced to North American Datum of 1927, Worcester County, MA, Hydrologic Unit 01090003, on left bank,40 ft south of Rt. 122, 0.6 mi downstream of Central Street, 350 ft downstream of railroad bridge, 0.6 mi southeast of Millville. Prior to 2006, site was located 0.25 mi downstream at railroad bridge.
DRAINAGE AREA - 263 mi².
REVISIONS HISTORY - Drainage area revised from 277 mi² to 263 mi² during 2006 water year.
SURFACE-WATER RECORDS
PERIOD OF RECORD - Discharge: Continuous record; April 2007 to October 2009 (Discontinued), then reactivated in 2012 to the present. Miscellaneous discharge measurements, water years 1978-2002, 2006-2009, and 2014-2015. Water Quality: miscellaneous water-quality samples taken, water years 1969-present.
GAGE - Water-stage recorder with telephone telemeter. Elevation of gage is 200 ft above National Geodetic Vertical Datum of 1929, from topographic map.
COOPERATION - Massachusetts Department of Environmental Protection.
WATER-QUALITY RECORDS
EXTREMES FOR PERIOD OF RECORD - EXTREMES FOR PERIOD OF RECORD (WQ):
WATER TEMPERATURE: Maximum instantaneous, 29.3 °C, Jul. 19, 2013; Minimum instantaneous, 0.0 °C, Jan. 4, and 23 to 29, 2013, and Feb. 9 to 12, 2013.
SPECIFIC CONDUCTANCE: Maximum instantaneous, 1550 µS/cm on Jan. 07, 2014; Minimum instantaneous, 202 µS/cm on Jun. 14, 2013.
TURBIDITY: Maximum instantaneous: 67 FMUs on Nov. 27, 2013; Minimum instantaneous: 0.0 FMUs on Feb. 23, 2013 and other dates.
CHLOROPHYLL: Maximum chlorophyll: 268 ppb on Aug. 25, 2013; Minimum instantaneous chlorophyll: 0.07 ppb on Mar. 20 2013.