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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 Discrete water samples data are undergoing modernization with this page no longer being updated with the latest data starting March 11, 2024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  04/15 09:18 EDT  7.9 42,200 8.1 9.5 -- -- 3.2 -- 
    04/15 09:12 EDT -- -- -- -- 96 -- -- -- 
Group Thames River Basin
01127768 THAMES R AT GROTON, CT. 
      BOTTOM  04/11 12:00 EDT  6.6 43,600 8.1 10.4 102 -- -- -- 
      TOP  03/13 11:15 EDT  6.1 27,300 8.0 11.1 100 -- 1.6 -- 
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  04/24 14:45 EDT  10.6 114 7.3 11.0 100 -- 5.8 22.91 
      Nitrate Sensor  04/24 14:45 EDT -- -- -- -- -- 0.38 -- -- 
01186000 WEST BRANCH FARMINGTON RIVER AT RIVERTON, CT  04/24 15:00 EDT  7.2 -- -- -- -- -- -- -- 
01191000 NORTH BRANCH PARK RIVER AT HARTFORD, CT  04/24 15:00 EDT  13.8 402 8.7 13.6 -- -- 2.7 -- 
    04/24 14:15 EDT -- -- -- -- 130 -- -- -- 
01193050 CONNECTICUT RIVER AT MIDDLE HADDAM, CT  04/23 11:15 EDT Eqp Eqp Eqp Eqp -- -- Eqp Eqp 
      Nitrate sensor  04/24 15:15 EDT -- -- -- -- -- 0.33 -- -- 
01194000 EIGHTMILE RIVER AT NORTH PLAIN, CT  10/13 12:15 EDT  14.6 -- -- -- -- -- -- -- 
01194500 EAST BRANCH EIGHTMILE RIVER NEAR NORTH LYME, CT  04/24 14:45 EDT  13.8 -- -- -- -- -- -- -- 
01194750 CONNECTICUT RIVER AT ESSEX, CT 
      at Essex Island Bottom  04/24 15:30 EDT  11.4 119 -- 10.8 -- -- -- -- 
      at Essex Island Top  04/24 15:30 EDT  11.5 117 7.2 11.2 -- -- 7.2 -- 
    04/24 14:30 EDT -- -- -- -- -- -- -- Eqp 
01194796 CONNECTICUT RIVER AT OLD LYME, CT 
      Bottom  04/24 14:45 EDT  11.4 545 7.5 11.2 -- -- -- -- 
      Top  04/24 14:45 EDT  11.4 501 7.4 11.0 -- -- 5.2 22.3 
      [(2)]  04/24 14:45 EDT -- -- -- -- -- 0.24 -- -- 
Group Quinnipiac River Basin
411513072512301 FARM RIVER AT FARM RIVER MARINA NR EAST HAVEN, CT 
      BOTTOM  04/24 15:30 EDT  12.1 33,500 -- 10.4 110 -- 11.8 -- 
      TOP  04/24 15:30 EDT  12.2 33,300 -- 10.5 111 -- 7.5 -- 
411626072514501 FARM RIVER AT THE TROLLY MUSEUM AT EAST HAVEN, CT  04/24 15:30 EDT  13.8 856 -- 11.6 113 -- 2.3 -- 
Group Housatonic River Basin
01208837 HOUSATONIC RIVER NR NELLS ISLAND NR STRATFORD, CT 
      BOTTOM  04/24 10:30 EDT  9.0 35,400 7.8 9.8 98 -- -- -- 
      TOP  04/24 09:00 EDT  11.6 1,410 7.6 10.4 97 -- 3.9 -- 
Group Southwestern Coastal River Basin
410502073236000 NORWALK HARBOR AT THE COVE MARINA NR E NORWALK, CT 
      BOTTOM  04/16 08:42 EDT  9.5 36,100 8.0 10.2 -- -- 10.0 -- 
    04/16 08:30 EDT -- -- -- -- 102 -- -- -- 
410606073245700 NORWALK R AT MARITIME AQUARIUM NR S NORWALK, CT 
      BOTTOM  04/24 15:06 EDT  11.1 34,300 8.0 9.6 -- -- 5.4 -- 
    04/24 15:00 EDT -- -- -- -- 100 -- -- -- 
      TOP  04/24 15:06 EDT  11.4 33,400 -- 9.9 -- -- 3.8 -- 
    04/24 15:00 EDT -- -- -- -- 96 -- -- -- 
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  03/10 03:12 EDT  6.3 5,180 7.7 12.0 -- -- 13.0 -- 
    03/10 03:00 EDT -- -- -- -- 101 -- -- -- 

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