Monitoring Results for Water Supply Emergency Order
Quality of Untreated Water Entering Stamford Water Treatment Plant
Inorganics
ND = not detected
Secondary Standards
Raw Water
Quality
Standards
mg/L
Date
9/30/2016
11/1/2016
12/5/2016
1/2/2017
2/1/2017
3/1/2017
0.01
1
0.01
250
0.05
1
0.2
2
0.05
0.5
0.005
10
1
0.01
0.05
NA
NA
Arsenic
ND
ND
ND
ND
ND
ND
Barium
0.021
0.025
0.023
0.026
0.021
0.022
Cadmium
ND
ND
ND
ND
ND
ND
Chloride
53.0
58.0
51.0
56.0
53.0
58.0
Chromium
ND
ND
ND
ND
ND
ND
Copper
ND
ND
ND
ND
ND
ND
Cyanide
ND
ND
ND
ND
ND
ND
Fluoride
0.05
0.05
0.06
0.05
0.04
0.04
Lead
ND
ND
ND
ND
ND
ND
MBAS
ND
ND
ND
ND
ND
ND
Mercury
ND
ND
ND
ND
ND
ND
Nitrate
0.046
0.044
0.003
0.186
0.062
0.075
Nitrite
ND
ND
ND
ND
ND
ND
Selenium
ND
ND
ND
ND
ND
ND
Silver
ND
ND
ND
ND
ND
ND
Iron
NA
0.28
0.30
0.46
0.12
0.09
Manganese
0.003
0.070
0.050
2,4-D
ND
ND
ND
2,4,5-TP (silvex)
Pesticides
Raw Water
Quality
Standards
mg/L
Date
9/30/2016
11/1/2016
12/5/2016
1/2/2017
2/1/2017
3/1/2017
0.002
0.0002
Endrin
Lindane
ND
ND
ND
ND
ND
ND
Discontinued
Discontinued
Discontinued
0.040
Methoxychlor Toxaphene
ND
ND
ND
ND
ND
ND
ND
ND
ND
NA
0.11
0.10
0.20
0.03
0.02