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! Discrete water samples data are undergoing modernization with this page no longer being updated with the latest data starting March 11, 2024
with a full decommission expected 6 months later. Learn more about the upcoming change and where to find the new samples data in our blog.

Current Conditions for Connecticut: Water Quality -- 19 site(s) found

PROVISIONAL DATA SUBJECT TO REVISION




Customize table to display other current-condition parameters
Station
Number
Station name Date/Time Temper-
ature,
water,
deg C
Specif-
ic
conduc-
tance,
wat unf
uS/cm @
25 degC
pH,
water,
unfltrd
field,
std
units
Dis-
solved
oxygen,
mg/L
Dis-
solved
oxygen,
percent
of sat-
uration
Nitrate
+
nitrite
water,
in situ
mg/L as
Turbid-
ity,
IR LED
light,
det ang
90 deg,
FNU
fDOM
fluor-
escence
water,
in situ
ug/L
QSE
Group Mystic River Basin
411940071590300 MYSTIC RIVER AT RAM ISLAND YACHT CLUB AT NOANK, CT 
      BOTTOM  05/07 09:12 EDT  10.6 44,400 8.0 8.4 -- -- 1.4 -- 
    05/07 09:00 EDT -- -- -- -- 89 -- -- -- 
Group Thames River Basin
01127768 THAMES R AT GROTON, CT. 
      BOTTOM  04/25 11:45 EDT  7.8 43,800 8.0 9.7 96 -- -- -- 
      TOP  04/25 10:30 EDT  9.5 29,200 8.1 9.9 96 -- 1.5 -- 
Group Connecticut River Basin
01161280 CONNECTICUT RIVER NEAR NORTHFIELD, MA  02/23 11:30 EST -- -- -- Dis -- -- -- -- 
    02/23 11:15 EST Dis Dis Dis -- -- -- Dis Dis 
      Nitrate Sensor  02/23 12:00 EST -- -- -- -- -- 0.38 -- -- 
      [(2)]  02/23 11:15 EST -- -- -- -- Dis -- -- -- 
01184000 CONNECTICUT RIVER AT THOMPSONVILLE, CT  05/17 02:00 EDT  15.5 129 7.3 9.3 93 -- 4.5 35.14 
      Nitrate Sensor  05/17 02:00 EDT -- -- -- -- -- 0.48 -- -- 
01186000 WEST BRANCH FARMINGTON RIVER AT RIVERTON, CT  05/17 02:00 EDT  7.8 -- -- -- -- -- -- -- 
01191000 NORTH BRANCH PARK RIVER AT HARTFORD, CT  05/17 02:00 EDT  15.3 229 7.5 8.9 89 -- 24.8 -- 
01193050 CONNECTICUT RIVER AT MIDDLE HADDAM, CT  05/17 02:15 EDT  16.3 134 7.4 9.0 -- -- 5.2 33.31 
      Nitrate sensor  05/17 02:15 EDT -- -- -- -- -- 0.35 -- -- 
01194000 EIGHTMILE RIVER AT NORTH PLAIN, CT  10/13 12:15 EDT  14.6 -- -- -- -- -- -- -- 
01194500 EAST BRANCH EIGHTMILE RIVER NEAR NORTH LYME, CT  05/17 01:45 EDT  15.4 -- -- -- -- -- -- -- 
01194750 CONNECTICUT RIVER AT ESSEX, CT 
      at Essex Island Bottom  05/17 02:30 EDT  16.6 122 -- 9.2 -- -- -- -- 
      at Essex Island Top  05/17 02:30 EDT  16.7 121 7.4 9.5 -- -- 3.2 34.1 
01194796 CONNECTICUT RIVER AT OLD LYME, CT 
      Bottom  05/17 01:45 EDT  16.5 427 7.5 9.4 -- -- -- -- 
      Top  05/17 01:45 EDT  16.4 368 7.5 9.1 -- -- 5.6 Eqp 
      [(2)]  05/17 01:45 EDT -- -- -- -- -- 0.23 -- -- 
Group Quinnipiac River Basin
411513072512301 FARM RIVER AT FARM RIVER MARINA NR EAST HAVEN, CT 
      BOTTOM  05/17 02:30 EDT  14.0 37,200 -- 7.6 85 -- 7.9 -- 
      TOP  05/17 02:30 EDT  15.4 8,330 -- 7.1 73 -- 16.2 -- 
411626072514501 FARM RIVER AT THE TROLLY MUSEUM AT EAST HAVEN, CT  05/17 02:30 EDT  15.4 160 -- 7.9 79 -- 12.5 -- 
Group Housatonic River Basin
01208837 HOUSATONIC RIVER NR NELLS ISLAND NR STRATFORD, CT 
      BOTTOM  05/03 09:45 EDT  12.1 36,100 7.9 9.9 105 -- -- -- 
      TOP  05/03 09:15 EDT  12.6 29,000 7.9 9.8 102 -- 1.9 -- 
Group Southwestern Coastal River Basin
410502073236000 NORWALK HARBOR AT THE COVE MARINA NR E NORWALK, CT 
      BOTTOM  05/04 10:00 EDT  14.2 35,200 8.0 8.8 96 -- 9.9 -- 
410606073245700 NORWALK R AT MARITIME AQUARIUM NR S NORWALK, CT 
      BOTTOM  05/17 02:06 EDT  14.6 35,300 7.7 6.7 -- -- 4.3 -- 
    05/17 02:00 EDT -- -- -- -- 76 -- -- -- 
      TOP  05/17 02:06 EDT  14.8 34,300 -- 7.4 -- -- 3.6 -- 
    05/17 02:00 EDT -- -- -- -- 83 -- -- -- 
410613073215801 SAUGATUCK RIVER LOWER EMBAYMENT NEAR SAUGATUCK, CT 
      TOP  04/16 12:06 EDT -- -- -- -- -- -- 14.0 -- 
410643073243700 NORWALK RIVER AT FERRY POINT NEAR NORWALK, CT 
      BOTTOM  10/31 10:24 EDT -- -- -- 5.4 -- -- -- -- 
      TOP  10/31 09:12 EDT -- -- -- 5.7 -- -- -- -- 
410724073221001 SAUGATUCK RIVER US RTE 136 NEAR SAUGATUCK, CT 
      BOTTOM  05/08 11:48 EDT  14.5 31,800 8.1 9.4 -- -- 31.2 -- 
    05/08 11:42 EDT -- -- -- -- 105 -- -- -- 

Data status codes:
  --     Parameter not determined
  Dis     Data-collection discontinued
  Eqp     Equipment malfunction