2010 Annual Water Quality Report

he City of New London annual
water quality report shows the source
of our water, lists the results of our
tests, and contains important
information about water and health
We are pleased to show
you how we have surpassed
water-quality standards.
Ifyou have concerns about the quality of water
please contact the customer service office.
Este informe contiene informacion importante acerca
de su agua potable. Haga que alguien lo traduzca para
usted, o hable con alguien quelo entienda
Customer Service:
(860) 447-5222
Safe Drinking Water Hotline:
(800) 426-4791
Water & Water Pollution Control Authority
a 2010 Annual
Water Quality
tanger Report
strafach
City of New London Utilities
Serving New London & Waterford Connecticut
tings are held at 7:00 pm
y ofeach month in the
y at 10 Broad Street (reat)

Water system data
The City of New London's water comes from lakes and.
reservoirsin a protected watershed that is located in
Waterford, Montille, and Salem The principal reservoirs Lake
Konomec, storing over 12 billion gallons of water. The water's
treated at Konomoc and delivered through a system of 210
miles of pipes, four pump stations and six water storage tanks
with a capacity of fifteen million gallons
The water system serves 45,000 customers through 14,000
water services. Over 2 billion gallons of water per years.
processed using coagulation, flocculation, sedimentation and
carbon filtration. Lime is added to the finished water to adjust
the ph, sodium hypochlorite to disinfect, fluoride for dental
health and phosphate for corrosion control Water quality ab
tests are performed regularly at the plant and by Groton Labs,
a state certified facilty
Maintenance of
2,000 hydrants
Lead and copper advisory
fege aipeen wept. etd EEN ereney
HE oIOe ose paras oo tin ss
Si IRies Wie Ayiooae neabgless Wace ae
Ber el cul ern ea lee er eet al
development Chien could show sight defile inaftetion
spanand eamiogabilties Adults whe dink ths water one
fa hee cualeeecn lacey wetdane apa
Pes tire k fr ral ti
lerlig or tesel seer ties Cppes BareseeaT
Pi ike eee roi cer alone
Peoplewith Wilsons Deze shouldcorsulthe personal
doctor
eo?
Pump station
Treatment plant
Source water assessment
‘The Connecticut Department of Public Health, Drinking Water
Division completed a water assessment of Lake Konomoc
Reservoir System that can be accessed on the Department of
Public Health's website: http: /Avwwcdphsstate.ctus The
assessment found that this public drinking water source,
Lake Konomoc, has a low susceptibility to potential sources
‘of contamination Additional source water assessment
information can be found atthe Environmental Protection
Agency's website at wwwepa gov
Source water protection
Source water is untreated water from streams, vers, lakes or
Underground aquifers that is used to supply public drinking,
water Preventing drinking water contamination at the source
‘makes good public health sense, good economic sense, and
good erwironmental sense. You can be aware of the
challenges of keeping drinking water safe and take an active
role in protecting drinking watec There are many ways you
can get involved in drinking water protection. Dispose properly
cof household chemical, help clean up the watershed, or attend
public meetings to ensure the community's need for safe
drinking water is considered in making decisions about land
se. For more information contact the EPA at 1-800-426-4791 or
visit the EPA: website at wwencepa gov/safewater/protecthtml
Treatment plant

Additional health information
‘Toensure that tap water is safe to drink, EPA sets limits on
the amount of certain contaminants in water provided by
publicwater systems. FDA regulations establish limits for
contaminants in bottied watec Small amounts of some
contaminants are commonly found in all drinking water,
including bottled water. The presence of contaminants does
not necessarily indicate that water poses a health risk
Some people may be more vulnerable to contaminants in
drinking water. Immuno-compromised persons, suchas
cancer patients undergoing chemotherapy, organ
transplant recipients, people with HIV/AIDS or other
immune system disorders, some elderly, and infants can be
particularly at risk from infections. These people should
seekadvice about drinking water from theie health care
providers. EBA/CDC guidelines on appropriate means to
lessen the riskof infection by cryptosporidium are available
from the Safe Drinking Water Hotline (800-426-4791),
The sources of drinking water (both tap and bottled
water) include rvers lakes, streams, ponds, reservoirs,
springs, and wells. As water travels over the surface of the
land or through the ground, i dissolves naturally occurring
‘minerals and radioactive material and can pick up
substances from the presence of animals or human activity.
Contaminants that may be presenti source water include:
{(A) Microbial contaminants, vieuses and bacteria)
Which may come from sewage treatment plants, septic
systems, agricultural livestock operations, and wildlife.
(8) Inorganic contaminants, (salts and metals) which
can be naturally occurting or result from urban storm
runoff industrial or domestic wastewater discharges, oil
and gas preduction, mining, or farming.
(0 Pesticides and herbicides, which may come from
variety of sources such as agriculture, storm water runof,
and residential uses.
(0) Organic chemical contaminants, (synthetic and
volatile organics) which are byproducts of industrial
processes and petroleum production, and.can alsocome
from gas stations, urban storm water run and septic
systems
(€ Radioactive contaminants, which can be naturally
‘occurring or be the result of el and gas production and
‘mining activities.
Water qual
How to read this table
The table shows the results of our water quality analyses.
Every regulated contaminant detected in the water, even in
the minutes traces is sted here. The table contains the
name of each substance, the ideal level for public health
(MCLG), the highest level allowed by regulation (MCL), the
amount detected, the usual sources of such contamination,
footnotes explaining our findings, and a key to units of
measurement
Definitions of MCLand MCLG are important.
‘Maximum Contaminant Level or MCL:
The highest level ofa contaminant that i allowed in
drinking water. MCLs are set as close to the MCLG's as
feasible using the best available treatment technology.
‘Maximum Contaminant Level Goal or MCLG:
The level of a contaminant in drinking water below which
there fs no known or expected risk to health MCLGs allow
fora margin of safety
Action Level or AL:
The concentration of a contaminant, which ifexceeded
triggers a treatment or other requirement, which a water
system must follow.
N/A: Not applicable
NTU: Nephelometric Turbidity Unit
Parts per million of ppm: The equivalent of one.
second in 12 days
Parts per billion or ppb: The equivalent of one
second in 32 years
Water conservation
tis vital that we all work together to maintain it and use it
wisely. Here are a few tips you can follow to help conserve:
+ Check for leaky toilets (put a drop of food coloring in.
the tank, let it sit. If the water in the bowl turns color,
you havea leak).A leaking faucet or toilet can dribble
away thousands of gallons of water a year
+ Consider replacing your S-gallon per flush toilet with an
efficient 1.6 gallon per flush unit. This will permanently
cut your water consumption by 25%.
+ Run only fullloads in dishwashers and washing machines
Rinse all hand-washed dishes at once.
+ Turn off the faucet while rushing teeth or shaving.
+ Water lawn and plants i the early morning or evening
hhours to avoid excess evaporation Don't water on a windy,
‘ainy or very hot day.
+ Water shrubs and gardens using a slow trickle around
the roots
“Apply mulch around plantings.
" low-water demanding plants that provide an
Regulated at the treatment facility
Level [Major sources
Substance MCLG MCL Detected —_indrinking water
Turbidity N/A SNTU on NTU Soil runoff
Chloride N/A 250ppm 16 ppm __Natural Deposits; runoff from
roadsalting
Sodium N/A *28ppm* 97ppm Natural Deposits; runoff from
Ppm* 97 pp! Dare
Sulfate N/A NIA ppm Naturally present in the
‘environment
Toc NA NA Y6ppm Naturally present in the
environment
Fluoride 4PM 4ppm —_Lo2ppm _ Water additive that promotes,
, ppm Rrongteeth
Barium N/A 2ppm _0.003ppm Naturally present in the
‘environment
Regulated In the New London distribution system
Manthly sources
Substance MCLG = MCL Average Range in drinking water
HAAS, N/A 6oppb 19.5 ppb. 8.8 -28.7 ppb priate ceiiaat)
TTHM N/A 8oppb —_—-sosppb 18.0- 5555 ppb errno ceases)
Chlorit 08: = Water additive used to
ine 4.0 ppm 4.0 ppm ISppm 0-134 ppm. oes
Regulated In the Waterford distribution system
Menthly sources
Substance MCLG MCL ‘Average Range in drinking water
HAAS N/A Goppb_—19.4ppb_ 9.6 28:7 ppb DS
THM N/A Boppb —523ppb—173-74.7 ppb Lae
Chlorir r = Water additive used to
ine 4OPPM 4ORPM —aIPpm ——_O-NGTRHM Water adie
Regulated at the tap of New London’s customers
Level Major sources
Substance MCLG MCL Detected Range ‘Sample Year Violation _in drinking water
Lead AL b ot detected 2008 No Corrosion of household
one Ere ection ew! ee
\3 AL= 8, ot detected 2008 No Corrosion of household
Copper 13pm 13pm O08 ppm nok detected over Paine
Regulated at the tap of Waterford’s customers
Highest
Level " Major sources
Substance MCLG MCL Detected Range Sample Year Violation _in drinking wat
Lead ‘oppb AL=1s ppb 2ppb not detected over 2008 No Corrosion of household
action level plumbing systems
E Alen 06 | jot detected 1008 No Corrosion of household
Copper 13 ppm AL=tappmooeRPM — net detectedover 2 Corsion of hows
** Although there is no EPA MCL for sodium, the State of Connecticut requires systems which exceed 28 ppm notify their customers,
0 individuals on sodium restricted diets can inform their physicians.
Monitoring and reporting violations
None
Public Education and Information
Please call the customer service office for more information about the water system, wastewater system
orenvironmental concerns. Additional information is available and public educational opportunities are avoilable
If you have any questions regarding this report or any other water quality questions
please call (860) 447-5222
The data presented in this report is from the most recent
testing done in accordance with regulations. Although we ran
thousands of tests for more than a hundred contaminants,
only the substances listed above were found. They are all
Qveoua
WATER