Rivers Alliance
of Connecticut
Connecticut's United Voice for River Conservation

Connecticut Streamflow Overview

Know The Flow!

Connecticut has had abnormally low rainfall since the beginning of April. See The Advanced Hydrological Prediction Service of the NWS for interactive maps that show where in the state the rainfall has been the most below normal. In spite of recent storms, the flow in most rivers and streams in Connecticut returns after each storm to a level signicantly below normal. Groundwater supplies wetlands, streams amd rivers between storms, and until the water table returns to a normal or average level, surface water flows will continue to drop alarmingly between storms.

Station Number (click to go to that Station)	Station name	Long- term mean flow 5/11	Long- term median flow 5/11	5/11 Actual Dis charge	Percent Below Mean
1184100	STONY BROOK NEAR WEST SUFFIELD CT.	33	13	5.8	82%
1209005	Saugatuck R below Saugatuck Res nr Lyons Plain CT	42	42	11	74%
1209761	FIVEMILE RIVER NEAR NEW CANAAN CT.	1.5	1.5	0.42	72%
1192883	COGINCHAUG RIVER AT MIDDLEFIELD CT	71	40	21	70%
1195490	QUINNIPIAC RIVER AT SOUTHINGTON CT.	60	31	18	70%
1186500	STILL RIVER AT ROBERTSVILLE CT.	235	146	74	69%
1196620	MILL R NR HAMDEN CT.	81	48	28	65%
1208925	MILL R NR FAIRFIELD CT	60	39	22	63%
1209500	SAUGATUCK R NR WESTPORT CT.	142	123	53	63%
1118300	PENDLETON HILL BROOK NEAR CLARKS FALLS CT.	11	8.3	4.5	59%
1124000	QUINEBAUG RIVER AT QUINEBAUG CT.	323	290	134	59%
1123000	LITTLE RIVER NEAR HANOVER CT.	77	54	32	58%
1187300	HUBBARD RIVER NR. WEST HARTLAND CT.	64	32	27	58%
1204000	POMPERAUG RIVER AT SOUTHBURY CT.	155	123	66	57%
1206900	NAUGATUCK RIVER AT THOMASTON CT.	243	165	104	57%
1209700	NORWALK R AT SOUTH WILTON CT.	81	53	35	57%
1188000	BUNNELL (BURLINGTON) BR NR BURLINGTON CT	12	8.1	5.2	57%
1199050	SALMON CREEK AT LIME ROCK CT.	62	40	27	56%
1196500	QUINNIPIAC RIVER AT WALLINGFORD CT.	281	221	127	55%
1189995	FARMINGTON RIVER AT TARIFFVILLE CT.	1480	1190	679	54%
1197500	HOUSATONIC RIVER NEAR GREAT BARRINGTON MA	678	533	317	53%
1185500	WEST BRANCH FARMINGTON RIVER NEAR NEW BOSTON MA	224	151	108	52%
1202501	SHEPAUG RIVER AT PETERS DAM AT WOODVILLE CT	39	39	19	51%
1188090	FARMINGTON RIVER AT UNIONVILLE CT.	818	547	400	51%
1200500	HOUSATONIC RIVER AT GAYLORDSVILLE CT.	2150	1750	1070	50%
1198000	GREEN RIVER NEAR GREAT BARRINGTON MA	110	84	55	50%
1203600	NONEWAUG RIVER AT MINORTOWN CT.	24	19	12	50%
1127000	QUINEBAUG RIVER AT JEWETT CITY CT.	1580	1429	797	50%
1198125	HOUSATONIC RIVER NR ASHLEY FALLS MA.	974	876	502	48%
1208950	SASCO BROOK NEAR SOUTHPORT CT.	19	12	9.8	48%
1184000	CONNECTICUT RIVER AT THOMPSONVILLE CT.	27700	23300	14400	48%
1208500	NAUGATUCK RIVER AT BEACON FALLS CT.	644	500	340	47%
1195100	INDIAN RIVER NEAR CLINTON CT.	13	8.5	6.9	47%
1124151	QUINEBAUG R AT WEST THOMPSON CONN.	325	296	174	46%
1184490	BROAD BROOK AT BROAD BROOK CT.	33	27	18	45%
1199000	HOUSATONIC RIVER AT FALLS VILLAGE CT.	1330	1140	740	44%
1123600	QUINEBAUG R BL WESTVILLE DAM NR SOUTHBRIDGE MA	203	190	113	44%
1203805	WEEKEEPEEMEE RIVER AT HOTCHKISSVILLE CT	39	43	22	44%
1194500	EAST BRANCH EIGHTMILE RIVER NEAR NORTH LYME CT.	53	46	30	43%
1186000	WEST BRANCH FARMINGTON RIVER AT RIVERTON CT	257	194	147	43%
1200000	TENMILE RIVER NEAR GAYLORDSVILLE CT	366	295	211	42%
1208873	ROOSTER RIVER AT FAIRFIELD CT	19	11	11	42%
1119500	WILLIMANTIC RIVER NEAR COVENTRY CT.	296	237	176	41%
1123360	QUINEBAUG R BL E BRIMFIELD DAM AT FISKDALE MA	144	135	86	40%
1121000	MOUNT HOPE RIVER NEAR WARRENVILLE CT.	73	48	45	38%
1125500	QUINEBAUG RIVER AT PUTNAM CT	646	584	419	35%
1127500	YANTIC RIVER AT YANTIC CT.	205	145	133	35%
1192500	HOCKANUM RIVER NEAR EAST HARTFORD CT.	156	129	104	33%
1172010	CONNECTICUT R AT I-391 BRIDGE AT HOLYOKE MA	18100	16900	12100	33%
1125100	FRENCH R AT N GROSVENORDALE CT.	167	159	112	33%
1120790	NATCHAUG RIVER AT MARCY RD. NEAR CHAPLIN CT	96	100	69	28%
1125490	LITTLE RIVER AT HARRISVILLE CT	54	35	40	26%
11230695	SHETUCKET RIVER AT TAFTVILLE CONN.	1130	903	891	21%
1122500	SHETUCKET RIVER NEAR WILLIMANTIC CT.	956	720	756	21%
1201487	STILL RIVER AT ROUTE 7 AT BROOKFIELD CENTER CT.	95	106	80	16%
1122000	NATCHAUG RIVER AT WILLIMANTIC CT.	397	307	337	15%
1203510	POOTATUCK R AT SANDY HOOK CT.	51	42	47	8%
1121330	FENTON RIVER AT MANSFIELDCT	31	34	29	6%
1193500	SALMON RIVER NEAR EAST HAMPTON CT.	252	196	252	0%
1194000	EIGHTMILE R AT NORTH PLAIN CT.	43	36	43	0%
1196561	Muddy River near East Wallingford	11	12	11	0%
1119382	WILLIMANTIC RIVER AT MERROW RD. NEAR MERROW CT	130	130	138	-6%
12035055	POOTATUCK RIVER AT BERKSHIRE	28	31	32	-14%
1212500	BYRAM RIVER AT PEMBERWICK	18	18	23	-28%
1205500	HOUSATONIC RIVER AT STEVENSON CT.	3270	3000	4410	-35%
12095493	Ridgefield Brook at Shields Lane nr Ridgefield CT	5.8	5.1	9	-55%
1209105	ASPETUCK RIVER AT ASPETUCK CT	1.7	1.7	19	-1018%
1191000	NORTH BRANCH PARK R AT HARTFORD CT.	33	20
1193050	CONNECTICUT R AT MIDDLE HADDAM CT
1209901	RIPPOWAM RIVER AT STAMFORD CT.	38	33

Click on any graphic below for more informationion
High Flow Low Flow	Not Ranked
Streamflow in CT (click to go to the data page)

The State of CT Drought Preparedness and Response Plan authorizes the state to issue a Drought Advisory if the majority of the following criteria are met:

Criteria to Declare Drought Advisory

Precipitation: Two months cumulative below 65% of normal
CT State Water Status

Ground Water: Three consecutive months below normal,
USGS Groundwater

Streamflow: Two out of three months below normal,
Burlington Brook Streamflow

Reservoirs: Average levels less than 80% of normal..
CT State Water Status

Palmer Drought Severity Index::
-2.0 to -2.99 (moderate drought)
Palmer Drought Index

Crop Moisture Index: range of
-1.0 to –1.99 (Abnormally Dry)

Daily(ish) Forest Fire Danger Report