Geology Reference
In-Depth Information
b.
What are the potential health effects (if any) of the dis-
Use information in Tables 13.4 and 13.5 to answer the ques-
infectant byproducts (listed in Table 13.1) that are pro-
tions below,
duced during disinfection of drinking water?
7.
a.
What water quality factors suggest that the North
Dakota farm well is contaminated?
c. For control of
Giardia lamblia
(and most other biologi-
cals in the water), what two techniques are employed?
b.
What are the most likely sources of contamination in
this well?
d.
A treatment technique that controls the corrosiveness
8
>
a
wha
t
i
s
th
e
mos
t
likel
y
caus
e
o
f
contamination of the
of water is used to limit copper and lead contaminants in
domestic well in Ohio?
drinking water. Why is corrosion a factor in copper and
lead contamination?
b.
Could the water be used for cooking? Explain.
TABLE 13.4 Dissolved Solids (mg/L), Inorganic Chemicals (mg/L), and pH of Four Surface-Water Samples
in the United States
Source
Water Quality
Factor
Water Quality
Factor
Public Supply Buffalo,
NY (Lake Erie)
Public Supply Seattle,
WA (Cedar River)
Mahoning River
Northeastern Ohio
Big Four Hollow Creek
East Central Ohio
Dissolved solids
177
40
890
1620
Sulfate
23
2.4
470
1100
Chloride
23
0.5
100
15
Nitrate
0.2
0.2
4.6
2.1
Iron
52
0.01
0.05
52
PH
8.0
7.4
5.5
2.9
TABLE 13.5 Dissolved Solids (mg/L), Inorganic Chemicals (mg/L), and pH of Four Groundwater Samples
in the United States
Water Quality
Factor
Water Quality
Factor
Source
Public Supply Wichita,
KS (well field)
Public Supply Shreve-
port, LA (well field)
North Dakota farm
well (30 ft deep)
Ohio domestic well
(47 ft deep)
Dissolved solids
844
142
15,390
2,400
Sulfate
128
12
1,750
24
Chloride
221
40
893
7,730
Nitrate
0.4
0.3
222
1.0
Iron
0.05
4.1
0.02
5.1
7.3
6.6
7.3
7.4
PH
