May 2021 CURRENT WATER RESOURCES CONDITIONS IN MASSACHUSETTS

CURRENT WATER RESOURCES CONDITIONS IN MASSACHUSETTS

May 2021

USGS New England Water Science Center, Massachusetts-Rhode Island Office

PROVISIONAL DATA: All data presented in this report are provisional and subject to revision.

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SURFACE WATER
Station Number	Station Name	Drainage Area (mi²)	Years Of Record	Normal Range (cfs)	Monthly Mean (cfs)	Monthly Mean (in)	Percentile Class
01096000	Squannacook River near West Groton, MA	65.9	71	91.8 - 180	161	2.82	Normal
01097300	Nashoba Brook near Acton, MA	12.8	57	15.1 - 32.6	28	2.52	Normal
01101000	Parker River at Byfield, MA	21.3	75	31.8 - 61.1	48.5	2.63	Normal
01103500	Charles River at Dover, MA	183	83	250 - 456	256	1.61	Normal
01105600	Old Swamp River near South Weymouth, MA	4.5	55	6 - 10.9	10.3	2.64	Normal
01105730	Indian Head River at Hanover, MA	30.3	54	43.4 - 78.2	58.3	2.22	Normal
01105880	Herring River at North Harwich, MA	9.4	54	11.8 - 18.1	7.28	0.89	Much below normal
01108000	Taunton River near Bridgewater, MA	261	91	377 - 706	423	1.87	Normal
01109000	Wading River near Norton, MA	43.3	95	56.9 - 108	66.4	1.77	Normal
01162500	Priest Brook near Winchendon, MA	19.4	105	25.1 - 55.5	44.2	2.63	Normal
01169000	North River at Shattuckville, MA	89	81	158 - 354	193	2.50	Normal
01169900	South River near Conway, MA	24.1	54	44.4 - 83.8	71.9	3.44	Normal
01170100	Green River near Conway, MA	41.4	53	88.1 - 146	82.4	2.29	Below normal
01171500	Mill River at Northampton, MA	52.6	82	80.5 - 164	132	2.89	Normal
01176000	Quaboag River at West Brimfield, MA	150	108	216 - 388	288	2.21	Normal
01181000	West Branch Westfield River at Huntington, MA	94	85	142 - 326	348	4.27	Above normal
01197500	Housatonic River near Great Barrington, MA	282	108	451 - 869	981	4.01	Above normal
01198000	Green River near Great Barrington, MA	51	69	73.6 - 134	194	4.39	Much above normal
01333000	Green River at Williamstown, MA	42.6	71	62.7 - 133	104	2.81	Normal

GROUNDWATER
Station Number	Station Name	Years Of Record	Normal Range (ft)	Monthly Median (ft)	Departure From Monthly Median (ft)	Percentile Class
411555070021901	NBW 228 (Nantucket, MA)	40¹	24.10 - 12.40	12.60	-10.00	Normal
415228070554601	LKW 14 (Lakeville, MA)	56¹	14.20 - 11.80	7.51	-5.39	High
422812071244401	ACW 158 (Acton, MA)	56¹	18.30 - 16.60	17.26	-0.34	Normal
424520070562401	NIW 27 (Newbury, MA)	56¹	6.04 - 4.27	4.40	-0.66	Normal
422341071464901	WSW 26 (West Boylston, MA)	25¹	5.59 - 3.20	4.47	0.16	Normal
422745073112001	PTW 51 (Pittsfield, MA)	57¹	15.00 - 14.00	14.23	-0.47	Normal
423401071093801	XMW 78 (Wilmington, MA)	67¹	7.41 - 6.60	7.02	-0.09	Normal
424204072015201	XNW 13 (Winchendon, MA)	79¹	4.92 - 3.71	3.47	-0.82	Above normal
¹ Daily Value Records and Field Readings ² Daily Value Records Only

Flow or Water Level	Percentile Range	Explanation
Low	0^th	The monthly mean streamflow or median water level during this month is the lowest ever recorded during the period of record for this site.
Much below normal	0^th to 10^th	The monthly mean streamflow or median water level during this month is less than the 10^th percentile when compared to all of the months during the period of record for this site.
Below normal	10^th to 25^th	The monthly mean streamflow or median water level during this month is between the 10^th and 25^th percentiles when compared to all of the months during the period of record for this site.
Normal	25^th to 75^th	The monthly mean streamflow or median water level during this month is between the 25^th and 75^th percentiles when compared to all of the months during the period of record for this site.
Above normal	75^th to 90^th	The monthly mean streamflow or median water level during this month is between the 75^th and 90^th percentiles when compared to all of the months during the period of record for this site.
Much above normal	90^th to 100^th	The monthly mean streamflow or median water level during this month is greater than the 90^th percentile when compared to all of the months during the period of record for this site.
High	100^th	The monthly mean streamflow or median water level during this month is the highest ever recorded during the period of record for this site.