HomeMy WebLinkAbout5.b. Consumer Confidence Report - Drinking WaterCITY OF ROSEMOUNT
EXECUTIVE SUMMARY FOR ACTION
CITY COUNCIL MEETING DATE: July 5, 2000
AGENDA ITEM: Consumer Confidence Report
AGENDA SECTION: Department Update
PREPARED BY: Alyson Morris, Water Resource Engineer
AGENQ
fft, �. 5
ATTACHMENTS: 1999 Consumer Confidence Report
APPROVED BY:
As mandated by the 1996 amendments to the federal Safe Drinking Water Act, the 1999
Consumer Confidence Report was distributed to residents the week of June 26. The intent of
the report is to advance consumers' understanding of drinking water, heighten awareness of the
need to protect water resources, and enhance the image of the professionals in the drinking
water community. The Consumer Confidence Report is sent out annually.
Rosemount drinking water meets or exceeds all regulatory standards. Data is given to the City
by the Minnesota Department of Health.
RECOMMENDED ACTION: None.
COUNCIL ACTION:
Some contaminants do not have Maximum
Contaminant Levels established for them and
are assessed using state standards known as
health risk limits to determine if they pose a
throat to human health. if unacceptable levels
of an unregulated contaminant arc found, the
response is the same as if an MCL has been
exceeded: the water system must inform its
customers and take other corrective actions. In
the table that follows are the unregulated
contaminants that were detected.
Contaminant
Level Found
Typical
Range
Avera a
( units)
Source
Sodium
3.2 6.1
6.1
Natural
(PPrn)
deposits
P�
Natural
Nickel(ppb)
nd
22.0
deposits,
22.0
industrial
sites.
COMPLIANCE WITH NATIONAL
PRIMARY DRLN'KLNG WATER
REGULATIONS
The sources of drinking water (both tap and
bottled water) include rivers, lakes, streams,
ponds, reservoirs, springs, and wells. As water
travels over the surface of the land or through
the ground, it dissolves naturally- occurring
minerals and, in some cases, radioactive
material, and can pick up substances resulting
from the presence of animals or from human
activity. Contaminants that may be present in
source water include:
Microbial contaminants (viruses and bacteria)
may come from sewage treatment plants, septic
systems, agricultural livestock operations, and
wildlife.
Inorganic contaminants (salts and metals) can
be naturally- occurring or result from urban
stormwater runoff, industrial or domestic
wastewater discharges, oil and gas production,
mining or farming.
Pesticides and herbicides may come from a
variety of sources such as agriculture, urban
stormwater runoff, and residential uses.
Organic chemical contaminants (synthetic and
volatile organic chemicals) are by- products of
industrial processes and petroleum production,
and can also come from gas stations, urban
stonnwater runoff, and septic systems.
Radioactive contaminants can be naturally-
occurring or the result of oil and gas production
and mining activities.
In order to ensure that tap water is safe to drink,
the U.S. Environmental Protection Agency
(EPA) prescribes regulations which limit the
amount of certain contaminants in water
provided by public water systems. Food and
Drug Administration regulations establish
limits for contaminants in bottled water which
must provide the same protection for public
health.
Drinking water, including bottled water, may
reasonably be expected to contain at least small
amounts of some contaminants. The presence
of contaminants does not necessarily indicate
that water poses a health risk. More
information about contaminants and potential
health effects can be obtained by calling the
Environmental Protection Agency's Safe
Drinking Water Hotline at 800 - 426 -4791.
Some people may be more vulnerable to
contaminants in drinking water than the
general population. Immuno- compromised
persons with cancer undergoing
chemotherapy, persons who have undergone
organ transplants, people with HIV /AIDS or
other immune system disorders, some elderly,
and infants can be particularly at risk from
infections. These people should seek advice
about drinking water from their health care
providers. EPAICDC guidelines on
appropriate means to lessen the risk of
infection by Cryptosporidium are available
from the Sgje Drinking Water Hotline at 800 -
426 -4791.
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0 CITY OF ROSEMOUNT
1999 DRINKING
WATER REPORT
The City of Rosemount is issuing the results of
monitoring done on its drinking water for the
Period from January 1 to December 31, 1999.
The purpose of this report is to advance
consumers' understanding of drinking water and
heighten awareness of the need to protect precious
water resources. This is a requirement of the
Federal Government's Safe Drinking Water Act
and will be sent out annually.
The City's water is frequently tested by City staff,
the N innesota Department of Health and
independent laboratories to ensure compliance with
federal standards.
Please call (651) 322 -2022 if you have any
questions about the City of Rosemount drinking
water or would like information about
opportunities for public participation in decisions
that may affect the quality of the water.
RO . SEMOUNT DRINKING WATER MEETS OR EXCEEDS ALL REGULATORY STANDARDS
in your
Contaminant (units) MC[ MCL Leve Typical Source of Meets Inihat; and Young children a typically m ore vulnemb
Range e* Regu le to lead in drinking wat than the general population. Standards 71te lead levels in the City of Rosemount water system were in cornplian
andards how ever , it is Possible that Lead levels at your h ome may be high ce with drinking water st
Nitrate (as nitrogen) hi than at other homes in the commula as &
(ppm) 10.0 10.0 nd-3.3 -3 Fertilizer, sewage, natural result Of materials used in your home's plumbing. If you arc concerned about elevated lead levels
deposits.: ✓ home's water, you may wish to have your water tested and flush your for 30 a to 2 minute f
Drink Water using UP water. Additional information is available from the Saf e UP s s be ore
Alpha Emitters (pCill) 0 15.0 5.9 Natural deposits ingWat Hodineat000426-4701.
Contaminant MCLG AL
(units)
90 Number of
Level sites ove AL Typical Source of contaminant
Combined Radium
Copper (Ppm)
Wito 0 5.0
IA Natural deposits.
Beryllium (ppb) 4.0 4.0 nd-2.0
Metal refineries, coal-
2.0 burning factories, and 1(
various us Other industries.
other er indu ic.'.
Xylenes (ppm) 10.0 10.0 ad-
0.0002 Petroleum and chemical
0.0002
factories. ✓
TTHM otal
(9-29-1998 ) NA 15
tribalom (ppb) 0 100.0 -
3.1 By-product of drinking ✓
water chlorination.
Fluoride (ppm) 4.0 4.0 0.87-1.5
1.09 Additive, natural deposits.
Barium (ppm) 2.0 2.0
0.12 Drilling wast metal
refineries, natural deposits.
Arsenic (ppb) 0 50.0 nd-2.9
Natural deposits, Orchards;
2.9 glass and electronics
S uc to ance comp lance wan tederal Standards. It some Is c I st v uc
I deteaW va sometimes a an avenge 0
1OA --
mg-L '-I-- Contaminant Level Goal (t
Contaminant in drinki =
k u
9 Percend e- ISIS V n (N ote:
� taken
10 % Of due samples taken that b th hi levels (Note: In
In
water below which
Peered risk to health. MCLGs allow 9w a margin o f safety.)
MCL Nts"Imum COntainhumt Level (the highest
i
siftletions; In which o 3 SAMPICS we taken. the average o f ft
= �L 4 a ve r ag e which Only 3 1. 4 Ink
kv
two with the h levels is taken to determine t h e go-
.90.
kM of a
Oonburaut that h allowed in drinki waxer. mcL we set a
close 00 the MCLGs as fusible us th b "Ishic
Percentile level.)
Z- P- liner I
PC14L- PicoCuries per liter (a meas o f nt
ky �
_ OL7
or
ftmUW
technology.)
Ph
Puts per billion (Man also be ex ja m i per
an he a.
r pressed crog
AL. Acti L (* concentration of & contaminant which, If
"We" bitten treatment Or Other requirement
It
liter. W)
PPm- Parts Per million (can also be eximessed " milligrams per
which a water
Yttqm must rollow.1
liter, m#A)
Contaminant MCLG AL
(units)
90 Number of
Level sites ove AL Typical Source of contaminant
M eets
Regulatory
Copper (Ppm)
Standards
(9-29-1998) NA 13
0.3 0 of20 Co rrosion of umbing, natural
deposits, woo
✓
Lead(ppb
(9-29-1998 ) NA 15
3.4 2 of 20 Corrosion of plumbing, natural
deposits
✓
The City of Rosemount Provides drinking wa t its residents from a I sou "
from 400 to 499 feet deep, that draw from the jordan aquifer. Water i treated at rce: six wells ranging
each well. The following i
added to the well water chlorine for disinfection, fluoride for improved dental health, and poly-phosphat t
Prevent naturally - occurring iron in the water from staining laundry. Rosemounts water c lassified
ranging from 16 to IS grains per gallon. is as "barcr
7he Cit of Rosemount cIfft about the environtramL This brochure a printed with soy-based ink on 30% post-conswwr recycled Paper by a Vmn"Ote Great Print Who Is Committed to reducing the use of chemicals and r waste In the printing process.
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Some contaminants do not have Maximum
Contaminant Levels established for them and
are assessed using state standards known as
health risk limits to determine if they pose a
threat to human health. If unacceptable levels
of an unregulated contaminant are found, the
response is the same as if an MCL has been
exceeded: the water system must inform its
customers and take other corrective actions. In
the table that follows are the unregulated
contaminants that were detected.
Contaminant
Level Found
Typical
Range
Average
(units)
Source
Sodium
aka
Natural
3.2 -6.1
6.1
(ppm)
deposits
Natural
nd-
deposits,
Nickel (ppb)
22.0
22.0
industrial
z
sites.
COMPLIANCE WITH NATIONAL
PRIMARY DRINKING WATER
REGULATIONS
The sources of drinking water (both tap and
bottled water) include rivers, lakes, streams,
ponds, reservoirs, springs, and wells. As water
travels over the surface of the land or through
the ground, it dissolves naturally- occurring
minerals and, in some cases, radioactive
material, and can pick up substances resulting
from the presence of animals or from human
activity. Contaminants that may be present in
source water include:
Microbial contaminants (viruses and bacteria)
may come from sewage treatment plants, septic
systems, agricultural livestock operations, and
wildlife.
Inorganic contaminants (salts and metals) can
be naturally- occurring or result from urban
stormwater runoff, industrial or domestic
wastewater discharges, oil and gas production,
mining or farming.
Pesticides and herbicides may come from a
variety of sources such as agriculture, urban
stormwater runoff, and residential uses.
Organic chemical contaminants (synthetic and
volatile organic chemicals) are by- products of
industrial processes and petroleum production,
and can also come from gas stations, urban
stormwater runoff, and septic systems.
Radioactive contaminants can be naturally -
occurring or the result of oil and gas production
and mining activities.
In order to ensure that tap water is safe to drink,
the U.S. Environmental Protection Agency
(EPA) prescribes regulations which limit the
amount of certain contaminants in water
provided by public water systems. Food and
Drug Administration regulations establish
limits for contaminants in bottled water which
must provide the same protection for public
health.
Drinking water, including bottled water, may
reasonably be expected to contain at least small
amounts of some contaminants. The presence
of contaminants does not necessarily indicate
that water poses a health risk. More
information about contaminants and potential
health effects can be obtained by calling the
Environmental Protection Agency's Safe
Drinking Water Hotline at 800 - 426 -4791.
Some people may be more vulnerable to
contaminants in drinking water than the
general population. Immuno- compromised
persons with cancer . undergoing
chemotherapy, persons who have undergone
organ transplants, people with HIV /AIDS or
other immune system disorders, some elderly,
and infants can be particularly at risk from
infections. These people should seek advice
about drinking water from their health care
providers. EPAICDC guidelines on
appropriate means to lessen the risk of
infection by Cryptosporidium are available
from the Safe Drinking Water Hotline at 800-
426 -4791.
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U � N �
CITY OF ROSEMOUNT
1999 DRINKING
WATER REPORT
The City of Rosemount is issuing the results of
monitoring done on its drinking water for the
period from January 1 to December 31, 1999.
The purpose of this report is to advance
consumers' understanding of drinking water and
heighten awareness of the need to protect precious
water resources. This is a requirement of the
Federal Government's Safe Drinking Water Act
and will be sent out annually.
The City's water is frequently tested by City staff,
the Minnesota Department of Health and
independent laboratories to ensure compliance with
federal standards.
Please call (651) 322 -2022 if you have any
questions about the City of Rosemount drinking
water or would like information about
opportunities for public participation in decisions
that may affect the quality of the water.
ROSEMOUNT DRINKING WATER MEETS OR EXCEEDS ALL REGULATORY STANDARDS.
*This value used to determine compliance with federal standards. It sometimes is the highest value detected and sometimes is an average of
all the detected values.
to
MCLG- Maximum Contaminant Level Goal (the level of a
contaminant in drinking water below which there is no known or
expected risk to health. MCLGs allow for a margin of safety.)
MCL- Maximum Contaminant Level (the highest level of a
contaminant that is allowed in drinking water. MCLs are set as
close to the MCLGs as feasible using the best available treatment
technology.)
AL- Action Level (the concentration of a contaminant which, if
exceeded, triggers treatment or other requirement which a water
system must follow.)
10% of the samples taken that had the highest levels. (Note: In
situations in which only 5 samples are taken, the average of the
two with the highest levels is taken to determine the 90'
percentile level.)
pCi/L- PicoCuries per liter (a measure of radioactivity).
ppb- Parts per billion (can also be expressed as micrograms per
liter, µg/1)
ppm- Parts per million (can also be expressed as milligrams per
liter, mg/1)
nd No detection.
Infants and young children are typically more vulnerable to lead in drinking water than the general population.
The lead levels in the City of Rosemount water system were in compliance with drinking water standards;
however, it is possible that lead levels at your home may be higher than at other homes in the community as a
result of materials used in your home's plumbing. If you are concerned about elevated lead levels in your
home's water, you may wish to have your water tested and flush your tap for 30 seconds to 2 minutes before
using tap water. Additional information is available from the Safe Drinking Water Hotline at 800 - 426 -4791.
Contaminant
(units)
MCLG
AL
Level
Found
Typical Source of
Meets
Range
Average *
Contaminant (units)
MCLG
MCL
Contamination
Regulatory
(9 -29 -1998)
deposits, wood preservatives.
Standards
Nitrate (as nitrogen)
10.0
10.0
nd -3.3
3.3
rtilizer, sewage, natural
✓
(ppm)
deposits.
Alpha Emitters (pCi /1)
0
15.0
-
5.9
Natural deposits.
If
Combined Radium
0
5.0
-
1.4
Natural deposits.
✓
(pCi /1)
Metal refineries, coal -
Beryllium (ppb)
4.0
4.0
nd -2.0
2.0
burning factories, and
✓
various other industries.
Xylenes (ppm)
10.0
10.0
nd
0.0002
petroleum and chemical
✓
0.0002
factories.
TTHM (Total
0
100.0
-
3.1
By- product of drinking
✓
trihalomethanes) (ppb)
water chlorination.
Fluoride (ppm)
4.0
4.0
0.87 -1.5
1.09
Additive, natural deposits.
✓
Barium (ppm)
(PP )
2.0
2.0
-
0.12
Drilling wastes, metal
,
refineries, natural deposits.
Natural deposits, orchards;
Arsenic (ppb)
0
50.0
nd -2.9
2.9
glass and electronics
✓
production.
*This value used to determine compliance with federal standards. It sometimes is the highest value detected and sometimes is an average of
all the detected values.
to
MCLG- Maximum Contaminant Level Goal (the level of a
contaminant in drinking water below which there is no known or
expected risk to health. MCLGs allow for a margin of safety.)
MCL- Maximum Contaminant Level (the highest level of a
contaminant that is allowed in drinking water. MCLs are set as
close to the MCLGs as feasible using the best available treatment
technology.)
AL- Action Level (the concentration of a contaminant which, if
exceeded, triggers treatment or other requirement which a water
system must follow.)
10% of the samples taken that had the highest levels. (Note: In
situations in which only 5 samples are taken, the average of the
two with the highest levels is taken to determine the 90'
percentile level.)
pCi/L- PicoCuries per liter (a measure of radioactivity).
ppb- Parts per billion (can also be expressed as micrograms per
liter, µg/1)
ppm- Parts per million (can also be expressed as milligrams per
liter, mg/1)
nd No detection.
Infants and young children are typically more vulnerable to lead in drinking water than the general population.
The lead levels in the City of Rosemount water system were in compliance with drinking water standards;
however, it is possible that lead levels at your home may be higher than at other homes in the community as a
result of materials used in your home's plumbing. If you are concerned about elevated lead levels in your
home's water, you may wish to have your water tested and flush your tap for 30 seconds to 2 minutes before
using tap water. Additional information is available from the Safe Drinking Water Hotline at 800 - 426 -4791.
Contaminant
(units)
MCLG
AL
90%
Level
Number of
sites over AL
Typical Source of Contaminant
Meets
Regulatory
Standards
Copper (ppm)
NA
1.3
0.3
0 of 20
Corrosion of plumbing, natural
✓
(9 -29 -1998)
deposits, wood preservatives.
Lead (ppb)
NA
15
3.4
2 of 20
Corrosion of plumbing, natural
✓
(9 -29 -1998)
deposits
The City of Rosemount provides drinking water to its residents from a groundwater source: six wells ranging
from 400 to 498 feet deep, that draw from the Jordan aquifer. Water is treated at each well. The following is
added to the well water: chlorine for disinfection, fluoride for improved dental health, and poly - phosphates to
prevent naturally- occurring iron in the water from staining laundry. Rosemount's water is classified as "hard ",
ranging from 16 to 18 grains per gallon.
The City of Rosemount cares about the environment. This brochure is printed with soy -based ink on 30% post- consumer recycled paper by a Minnesota Great Printer, who is committed to reducing the use of chemicals and waste in the printing process.