Cold Spring Harbor

Cold Spring Harbor

Physical/Chemical Data

Physical, chemical and biological properties of the surface water that are measured continuously while the patrol boat is underway.

Entero Count (fecal indicator) and Rainfall

59 Samples taken

Sample Date [i] Enterococcus Count

Entero Count

Enterococcus (“Entero”) is a fecal indicating bacterium that lives in the intestines of humans and other warm-blooded animals. It is the EPA preferred indicator for sewage contamination.

QualityRain, day of (in)Prior Day2 Days Prior3 Days Prior Rain4 Days Total Rain
SortSortSortSortSortSortSortSort
10/17/201727Acceptable0.00.00.00.00.1
09/12/201715Acceptable0.00.00.00.00.0
08/15/20176Acceptable0.10.00.00.70.7
07/11/20176Acceptable0.20.00.00.00.2
06/13/20173Acceptable0.00.00.00.00.0
05/16/20174Acceptable0.00.00.11.31.4
10/16/201614Acceptable0.00.00.00.00.0
09/15/201668Beach Advisory0.00.00.00.00.0
08/16/201613Acceptable0.00.00.10.10.2
07/14/20167Acceptable0.00.00.00.00.0
06/16/20164Acceptable0.00.00.00.00.0
05/21/20168Acceptable0.00.00.00.00.0
10/13/20159Acceptable0.00.00.00.00.0
09/12/201516Acceptable0.00.10.90.01.0
08/13/201512Acceptable0.00.00.90.00.9
07/09/20153Acceptable0.00.00.10.00.1
06/12/20152Acceptable0.00.00.00.30.3
05/13/20153Acceptable0.00.00.00.00.0
10/14/201415Acceptable0.00.00.00.10.1
09/09/20145Acceptable0.00.00.00.10.1
08/13/201419Acceptable0.00.00.00.00.0
07/09/201446Acceptable0.00.10.20.00.3
06/14/201429Acceptable0.00.10.00.10.2
05/14/20145Acceptable0.00.00.00.00.0
10/18/201322Acceptable0.00.00.00.00.0
09/20/20133Acceptable0.00.00.00.00.0
08/17/201311Acceptable0.00.00.00.00.0
07/19/201384Beach Advisory0.00.10.00.00.1
06/21/201320Acceptable0.00.00.00.00.0
06/01/20134Acceptable0.00.00.00.00.0
10/13/20127Acceptable0.00.00.00.00.0
09/13/20126Acceptable0.00.00.00.00.0
08/15/201211Acceptable0.30.10.00.00.4
07/19/201229Acceptable0.00.20.00.00.2
06/14/20121Acceptable0.00.20.30.00.5
05/18/2012<1Acceptable0.00.00.00.30.3
10/18/201115Acceptable0.00.00.10.00.1
09/17/201133Acceptable0.00.00.10.00.1
08/18/201127Acceptable0.10.00.10.60.8
07/17/201110Acceptable0.00.00.00.00.0
06/29/201121Acceptable0.50.00.00.00.5
05/18/201126Acceptable0.90.80.10.32.1
10/14/201033Acceptable0.00.00.30.10.4
09/13/201013Acceptable0.00.00.00.00.0
08/19/20106Acceptable0.00.00.01.01.0
07/20/2010184Beach Advisory0.00.00.00.00.0
06/17/201026Acceptable0.00.00.00.00.0
05/23/201012Acceptable0.00.00.00.00.0
10/21/200911Acceptable0.00.00.00.20.2
09/16/200925Acceptable0.00.00.00.00.0
08/22/200912Acceptable0.30.30.00.00.6
07/30/200915Acceptable0.00.30.00.20.5
06/09/200978Beach Advisory0.90.00.00.00.9
05/14/20096Acceptable0.10.00.00.00.1
10/22/200814Acceptable0.00.00.00.00.0
09/20/20082Acceptable0.00.00.00.00.0
08/06/20081Acceptable0.30.00.00.00.3
07/16/20081Acceptable0.00.00.60.00.6
06/17/200819Acceptable0.00.20.00.10.3

Entero Count (fecal indicator) and Rainfall Correlation

59 Samples taken

All Water Quality Parameters

59 Samples taken

Sample Date [i] Entero Count

Entero Count

Enterococcus (“Entero”) is a fecal indicating bacterium that lives in the intestines of humans and other warm-blooded animals. It is the EPA preferred indicator for sewage contamination.

Quality [i] Temp (f)

Temperature

Hudson River water temperature changes seasonally. Surface water temperature can change on small scales in the river reflecting natural and human influences.

[i] Salinity

Salinity

Estuaries like the Hudson are where freshwaters in rivers meet the sea. Salinity tells us about the relative contribution of fresh and salt water within a particular region of the estuary. 

[i] Chlorophyll

Chlorophyll

A measure of the amount of microscopic algae present in the water. High chlorophyll counts can mean high levels of the nutrients phosphorus and nitrogen, and the threat, or presence, of algae blooms.

[i] Turbidity

Turbidity

Turbidity is a measure of the amount of fine particles suspended in the water. As turbidity rises, light penetration, a key factor for aquatic plants and algae, diminishes.

[i] Oxygen

Oxygen

Oxygen concentrations in the water are closely connected to biological activities. Surface waters are typically in equilibrium with the atmosphere such that the oxygen concentration near the surface is close to fully saturated (100%).

SortSortSortSortSortSortSortSort
10/17/201727Acceptable69.62.82.416.386.3
09/12/201715Acceptable73.21.64.410.493.9
08/15/20176Acceptable77.30.34.816.589.8
07/11/20176Acceptable77.90.14.116.497.8
06/13/20173Acceptable69.40.16.114119.8
05/16/20174Acceptable59.10.12.920.099.9
10/16/201614Acceptable66.751.84887
09/15/201668Beach Advisory78.44.23.2n/a90
08/16/201613Acceptable82.81.333784
07/14/20167Acceptable78.11.34.11891
06/16/20164Acceptable70.314.43495
05/21/20168Acceptable600.15.448105
10/13/20159Acceptable67.52.73.23887
09/12/201516Acceptable79.62.73.43180
08/13/201512Acceptable79.41.43.22784
07/09/20153Acceptable750.13.32888
06/12/20152Acceptable70.70.14.61297
05/13/20153Acceptable59.80.23.839n/a
10/14/201415Acceptable66.91.51.73292
09/09/20145Acceptable76.60.32.72687
08/13/201419Acceptable77.90.62.44087
07/09/201446Acceptable77.30.13.42686
06/14/201429Acceptable69.20.43.84687
05/14/20145Acceptable580.14.927100
10/18/201322Acceptable66.61.62.43391
09/20/20133Acceptable730.33.72391
08/17/201311Acceptable77.70.12.45885
07/19/201384Beach Advisory86.40.23.66675
06/21/201320Acceptable66.90.15.111094
06/01/20134Acceptable67.60.14.518101
10/13/20127Acceptable651.34.43888
09/13/20126Acceptable782.83.92588
08/15/201211Acceptable81.41.52.61099
07/19/201229Acceptable81.42.92.92086
06/14/20121Acceptable72.10.11.72991
05/18/2012<1Acceptable62.70.12.51994
10/18/201115Acceptable61.90.11.37889
09/17/201133Acceptable66.50.11.327985
08/18/201127Acceptable79.20.41.54780
07/17/201110Acceptable80.10.13.2n/an/a
06/29/201121Acceptable75.80.14.52790
05/18/201126Acceptablen/an/an/an/an/a
10/14/201033Acceptable61.60.13.63482
09/13/201013Acceptable74.41.15.41983
08/19/20106Acceptable82.61.510.635121
07/20/2010184Beach Advisory82.21.52.43484
06/17/201026Acceptable70.90.657784
05/23/201012Acceptable64.10.36.556101
10/21/200911Acceptable58.50.22.33288
09/16/200925Acceptable73.71.32.12281
08/22/200912Acceptable79.40.12.72577
07/30/200915Acceptable77.20.12.82489
06/09/200978Beach Advisoryn/an/an/an/an/a
05/14/20096Acceptable58.90.17.534107
10/22/200814Acceptable60.81.71.82788
09/20/20082Acceptablen/an/an/an/an/a
08/06/20081Acceptablen/an/an/an/an/a
07/16/20081Acceptable780.42.22194
06/17/200819Acceptablen/an/an/an/an/a

Water Quality*

Acceptable (0–60) Beach Advisory (61+)

*Single sample thresholds;
Enterococcus count per 100mL

Prior Four Day Rainfall
(in inches)

Dry Weather (0–0.25) Wet Weather (0.25+)

Enterococcus is an EPA-approved fecal contamination indicator.

Samples taken by Riverkeeper, Lamont-Doherty Earth Observatory and CUNY Queens College staff, and processed on the Riverkeeper vessel, according to the 2014 Quality Assurance Project Plan.

Rainfall data comes from wunderground.com. Wet weather is a common trigger of fecal contamination.

What do the Numbers Mean?

Water Quality scoring is based on the 2012 Recreational Water Quality Criteria from the US Environmental Protection Agency (EPA) for safe swimming. Learn More

About this location:

Cold Spring, NY
The town docks of Cold Spring host a fishing pier, a yacht club, and a village waterfront where fishing, kayaking, and recreational boating are all sources of human contact with the water.

Agencies Responsible:

Putnam County Dept. of Health: 845-278-6558 and NYSDEC Region 3: 914-428-2505

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