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Streamflow Measurements for the Nation

! Streamflow measurement pages will be decommissioned in early 2026. Please find the modernized pages in WDFN that suit you best. Learn more about our modernization plans and timeline and new pages.

USGS 01096548 STONY BROOK AT N CHELMSFORD, MA
Middlesex County, Massachusetts
Hydrologic Unit Code 01070006
Latitude  42°38'06.21", Longitude  71°22'46.33" NAD83
Gage datum 92 feet above NAVD88
Output formats
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Meas.
Number		   Date       Time Time
Datum		 Measurement
Used?		   Who Measuring
Agency		 Stream
flow
(ft3/s)		 Gage
Height
(ft)		 GH
Change
(ft)		 Meas.
Duration
(hr)		 Meas.
Rated		   Control Flow
Adjust.
Code 
442024-09-26 11:46:08EDTYesRJTUSGS2.08 Poor NONE
432024-08-29 11:59:01EDTYesSAUSGS7.71 Fair NONE
422024-07-22 12:30:15EDTYesZPR, SAUSGS5.95 Fair NONE
412024-06-11 10:05:35EDTYesZPR/SAUSGS33.6 Poor NONE
402024-05-16 10:39:28EDTYesJTHUSGS78.8 Fair NONE
392024-04-03 10:32:47EDTYesJTHUSGS206 Fair NONE
382024-03-07 12:50:34ESTYesJTH/SAUSGS265 Poor NONE
372024-02-07 09:24:45ESTYesZPRUSGS139 Fair NONE
362024-01-04 09:58:57ESTYesZPRUSGS149 Fair NONE
352023-12-12 10:07:53ESTYesZPRUSGS175 Good NONE
342023-11-08 11:08:35ESTYesZPRUSGS64.4 Poor NONE
332023-10-12 10:51:21EDTYesZPRUSGS78.6 Fair NONE
322023-08-10 11:35:22EDTYesrtbUSGS82.9 Poor NONE
312023-07-13 11:31EDTYesPSCUSGS108 0.50Fair NONE
302023-06-13 11:28:57EDTYesPSCUSGS31.4 0.60Good NONE
292023-05-08 10:54:30EDTYesPSC/EJHUSGS105 0.70Fair NONE
282023-04-12 10:56:30EDTYesPSCUSGS73.4 0.50Fair NONE
272023-03-06 11:22:30ESTYesPSCUSGS101 0.50Fair NONE
262023-02-02 11:51ESTYesPSCUSGS161 Fair NONE
252023-01-04 11:45:30ESTYesPSCUSGS112 0.50Fair NONE
242022-12-06 12:39:20ESTYesJERUSGS32.1 Fair NONE
232022-11-03 11:32:11EDTYesPSCUSGS45.9 Fair NONE
222022-10-06 11:19:28EDTYesJER/PSCUSGS3.39 Fair NONE
212022-09-07 14:02:42EDTYesJERUSGS4.90 Fair NONE
202022-08-03 11:55:28EDTYesPSCUSGS0.97 Poor NONE
192022-07-14 09:49:39EDTYesJMT/JERUSGS3.84 Fair NONE
182022-07-14 09:41:19EDTYesJMT/JERUSGS3.85 Fair NONE
172022-06-15 09:11:51EDTYesPSCUSGS28.5 Good NONE
162022-05-05 12:53:07EDTYesJMTusgs74.3 Fair NONE
152022-04-04 11:43:33EDTYesKAFUSGS95.2 Good NONE
142022-03-09 11:47:01ESTYesPSCUSGS138 Fair NONE
132022-02-09 12:02:54ESTYesKKC/JTHUSGS145 0.40Poor NONE
122022-01-26 11:33:30ESTYesJDLUSGS68.5 Good NONE
112021-12-09 12:59:58ESTYesrtbUSGS53.4 Fair NONE
102021-11-10 12:20:42ESTYesMCUUSGS65.0 Fair NONE
92021-10-12 11:54:19EDTYesMCUUSGS74.7 Fair NONE
82021-09-09 11:37:06EDTYesMCUUSGS93.6 Good NONE
072021-08-05 10:22:30EDTYescpyUSGS52.0 0.50Good NONE
62021-07-07 11:27:47EDTYesMCUUSGS81.3 Fair NONE
52021-06-01 12:17EDTYesMCUUSGS112 Good NONE
32021-06-01 11:59:30EDTYescpyUSGS110 1.00Fair NONE
42021-05-11 14:19:52EDTYesMCUUSGS148 Fair NONE
12021-04-07 10:06:30EDTYesCNCBUSGS44.1 Good NONE