Newport Comprehensive Land Use Plan - Existing Conditions | Page 185

13 Infrastructure & Water Supply

Microbiological
Contaminants
Metolachlor (5)
(6)

Period
2014

Unit
ppb

MCL
n/a

SMCL

MCLG
n/a

UCMR 3
Contaminants

Period

Unit

MCL

MCLG

Total chromium
(7)

2014

ppb

n/a

Strontium (7)

2014

ppb

Vanadium (7)

2014

Chlorate (7)

Chromium-6
(Hexavalent
chromium) (7)

Detected
Level
0.20

SDWA
Violation
n/a

Range
ND-0.20

Major Sources
Used as an herbicide
for weed control on
agricultural crops

Detected
Level

Range

Major Sources

SDWA
Violation

n/a

0.29

ND-0.29

Occurs naturally in
the environment and
is present in water
from the erosion of
chromium deposits
found in rock and
soil.

n/a

n/a

n/a

80

52-80

Strontium is a metal
which occurs
naturally in the
environment

n/a

ppb

n/a

n/a

0.49

ND-0.49

Vanadium is a metal
that naturally occurs
in many different
minerals and in fossil
fuels

n/a

2014

ppb

n/a

n/a

650

98-650

A by-product from
the production of
chlorine dioxide

n/a

2014

ppb

n/a

n/a

0.11

ND-0.11

Occurs naturally in
the environment and
is present in water
from the erosion of
chromium deposits
found in rock and
soil.

n/a

Water Quality Table Footnotes:
(1)0.30 NTU was the highest single turbidity measurement recorded. The lowest monthly percentage of samples meeting the
turbidity limit was 100%. Turbidity is a measure of the cloudiness of the water. We monito it because it is a good indicator of the
effectiveness of our filtration.
(2) Detected level indicates the 90 percentile value of the 30 samples taken. The Range indicates the number of samples above
the action level.
(3) Newport Water adds fluoride to its treated water as an aid in dental cavity prevention in young children.
(4) Some people who drink water containing TTHM's in excess of the MCL over many years may experience problems with their
liver, kidneys or central nervous system and may have an increased risk of contracting cancer. Detected level is based on the
highest four-quarter average.
(5) Sampled and monitored at raw water supply reservoirs prior to treatment.
(6)The EPA requires us to report this contaminant which is on the Contaminant Candidate List 3.
(7) 2014 UCMR 3 Monitoring for unregulated contaminants at entry points (plant effluents) and distribution points. Newport was
required to sample and analyze for Assessment List 1
Source: City of Newport Department of Utilities Water Division 2014 Consumer Confidence Report
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Draft Existing Conditions (March 2016)

Page 13-7