2018 Water Utilities Consumer Confidence Report 2018 Water Utilities Consumer Confidence Report | Page 3

Table B. Unregulated Substances. These substances are not
currently regulated by EPA. The purpose of unregulated contaminant monitoring
is to assist EPA in determining the occurrence of unregulated contaminants in
drinking water and whether future regulation is warranted.
Substance
Units Avg.
Chloroform
Bromodichloromethane
Chlorodibromomethane
Bromoform
Dichloroacetic Acid
Bromoacetic Acid
Dibromoacetic Acid
Chloroacetic Acid
Trichloroacetic Acid
ppb
ppb
ppb
ppb
ppb
ppb
ppb
ppb
ppb
3.4
3.3
3.1
0.3
3.15
2.84
2.68
0.48
0.09
Min. Max. MCL
2.0
2.9
2.9
0.1
3.05
2.26
1.0
0.31
0.02 4.2
3.5
3.2
0.5
3.24
3.99
6.51
0.73
0.11 Not Regulated
Not Regulated
Not Regulated
Not Regulated
Not Regulated
Not Regulated
Not Regulated
Not Regulated
Not Regulated
Arlington Water Utilities produced
19,101,697,980 gallons of treated
water for use by customers in
Arlington in 2018. The department
reported a system water loss
percentage of 9.18 percent, which
refers to the amount of water lost
due to leaks, water line breaks or
other non-revenue water use.
I NFO
MCLG Possible Source
NE
NE
NE
NE
NE
NE
NE
NE
300
By-product of drinking
water disinfection; not
regulated individually;
included in Total
Trihalomethanes.
By-product of drinking
water disinfection; not
regulated individually;
included in Haloacetic
Acids.
Other Substances of Interest
Substance
Total:
Alkalinity
Hardness
Hardness
Calcium
Units Avg Min Max
ppm
ppm
grains/gal.
ppm
83.8
93.5
5.5
30
70.4 108
78.4 141
4.6
8.2
26 50
Sodium ppm 20.6 18.2 23.1
Magnesium ppm 3.23 3.03 3.43
Chloride ppm 17 14 21
Total Dissolved
Solids
pH
ppm 175 146 211
pH units
8.2
7.7
8.6
The Environmental Protection Agency (EPA) Safe Drinking Water Hotline

Drinking water, including bottled water, may reasonably be expected to
contain at least small amounts of some contaminants. The presence of these
contaminants does not necessarily indicate that water poses a health risk. In order
to ensure that tap water is safe to drink, the EPA prescribes regulations that limit the
amount of certain substances in water provided by public water systems.

More information about contaminants and potential health effects can be
obtained by calling the Environmental Protection Agency’s (EPA) Safe Drinking
Water Hotline at 800-426-4791 or visiting the website at www.epa.gov/safewater.
Substances Expected to be in
Drinking Water
The City of Arlington and the State of Texas both analyze
your drinking water. Any regulated substances that were
detected during the last year are shown in Table A. As
shown in the table, all are well below the established
maximum contaminant levels. All water dissolves
substances from the ground as it flows over and through
it. Substances that may be present in raw water include
such things as:
Arlington Water Utilities Lab Staff
Water Utilities Laboratory by the Numbers:
7 4 135 9 4 6
Full-time
staff Part-time
staff Combined
years of
lab
experience TCEQ
Water
Operator
licenses Master’s
degrees – Bachelor’s
degrees -
2 chemistry,
1 education,
1 business 5 biology,
1 geology
(3 Class A,
4 Class B, 1
Class C and 1
Class D)
Microbes such as
viruses and bacteria
that come from
septic systems,
agricultural livestock
operations and
wildlife Pesticides and
herbicides that may
come from a variety
of sources such as
agriculture, urban
storm water runoff
or residential uses
Salts and metals
that can be naturally
occurring or the
result of urban
storm water
runoff, industrial or
domestic wastewater
discharges or
farming Radioactive
substances that are
naturally occurring
Organic chemical substances that include
synthetic and volatile organic chemicals
that are by-products of industrial
processes and can also come from gas
stations and urban storm water runoff
Contaminants may be found in drinking water that could cause taste,
color, or odor problems but are not necessarily causes for health concerns.
For more information, call Laboratory Services at 817-575-8984.
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