Annual Drinking Water Quality Report

The City of Lewis 4-17-2003


This report is designed to inform you about the water quality and services that your water system provides to you. Every water system’s goal is to provide customers with a safe and dependable supply of drinking water.

As you may be aware, the water source for the City of Lewis is groundwater from 3 wells.

This report shows the water quality for 2002 and what it means. The bottom line is that the water that is provided to you is safe.

If you have any questions about this report or concerning your water utility, please contact: Chad Nystrom, City Superintendent or Vickie Kennedy, Mayor.

It’s important that customers be aware of the efforts that are made to continually improve their water system. To learn more, please attend any of the City of Lewis regularly scheduled meetings. They are held on the second Monday of each month, at 7 p.m. at the new fire house meeting room.

In the continuing efforts to maintain a safe and dependable water supply it may be necessary to make improvements in your water system. The costs of these improvements may be reflected in the rate structure. Rate adjustments may be necessary to address these improvements.

The City routinely monitors for constituents in the drinking water according to federal and state laws. The table which follows shows the results of this monitoring. It’s important to remember that the presence of these constituents does not necessarily pose a health risk. More information about contaminants and their potential health effects can be obtained by calling the Environmental Protection Agency’s Safe Drinking Water Hotline at 1-800-426-4791.

All 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 the water poses a health risk.

Quality standards for public water systems are set at very stringent levels. To understand the possible health effects described for most constituents we have provided the following example. A person would have to drink 2 liters of water every day at the maximum drinking water standard for a lifetime to have a one-in-a-million chance of having the described health effect.

Some people may be more vulnerable to contaminants in drinking water than the general population. Immuno-compromised persons such as persons with cancer undergoing chemotherapy, persons with HIV/AIDS or other immune system disorders, and some elderly and infants can be particularly at risk from infections. These people should seek advice about drinking water from their health care providers. EPA/CDC guidelines on appropriate means to lessen the risk of infection by cryptosporidium, other microbiological contaminants and information about potential health effects can be obtained by calling the Environmental Protection Agency’s Safe Drinking Water Hotline At 1-800-426-4791.

To help you better understand these terms we’ve provided the following definitions.

Non-Detects (ND)- no presence of the constituent
Parts per Million (ppm)-one part per million corresponds to one minute in two years or one penny in $10,000
Parts per Billion (ppb)- one part per billion corresponds to one minute in 2,000 years, or one penny in $10,000,000.
Picocuries per Liter (pCi/L)- a measure of the radioactivity in water
Million Fibers per Liter (MFL)- a measure of the presence of asbestos fibers that are longer than 10 micrometers.
Nephelometric Turbidity Unit (NTU)- a measure of the clarity of water. Turbidity in excess of 5 NTU is just noticeable to the average person.
Treatment Technique (TT)- a required process intended to reduce the level of a contaminant in drinking water.
Maximum Contaminant Level (MCL)- the highest level of a contaminant that is allowed in drinking water.
Maximum Contaminant Level Goal (MCLG)- the level of a contaminant in drinking water below which there is no known or expected risk to health.

Water Quality Report for 2002

Testing Results for the City of Lewis, Kansas

Inorganic Contaminant
Violation
MCLG
MCL
Result
Unit
Date
Likely Source of Contaminant
Arsenic
N
50
50
1
ppb
07/00
Erosion of natural deposits
Barium
N
2
2
.254-.291
ppm
07/00
Erosion of natural deposits
Floride
N
4
4
.300-.340
ppm
07/00
Additive which promotes strong teeth
Nitrate
N
10
10
6.51-12.12
ppm
01/02
Erosion of natural deposits
Atrazine
N
3
3
0.27
ppb
09/00
Runoff from herbicide used on row crops
Sites Above AL
90th Percent
Lead
N
0
AL=15
3.6
ppb
08/00
Corrosion of household plumbing systems
Copper
N
0
AL=1.3
0.2114
ppm
08/00
Corrosion of household plumbing systems

Secondary Contaminants
Date
Result
Unit
MCL
Vio
Likely Source of Contaminant
Iron
07/00
.037-.046
ppm
0.3
N
Erosion of natural deposits
Aluminum
07/00
4-12
ppb
50-200
N
Erosion of natural deposits
Nickel
07/00
1-2
ppb
N/A
N
Erosion of natural deposits
Calcium
07/00
65-76
ppm
75-200
N
Erosion of natural deposits
Magnesium
07/00
8.46-9.79
ppm
50-150
N
Erosion of natural deposits
Sodium
07/00
24-28
ppm
100
N
Erosion of natural deposits
Potassium
07/00
2.66-2.72
ppm
100
N
Erosion of natural deposits
Chloride
07/00
9.2-11
ppm
250
N
Erosion of natural deposits
Sulfate
07/00
19-21
ppm
250
N
Erosion of natural deposits
Total Hardness
07/00
197-232
ppm
400
N
Erosion of natural deposits
Alkalinity as CACO3
07/00
215-241
ppm
60-300
N
Erosion of natural deposits
pH
07/00
7.43-7.48
pH Units
6.5-8.5
N
Erosion of natural deposits
Specific Conductivity
07/00
555-620
umho/l
1500
N
Erosion of natural deposits
Total Dissolved Solids
07/00
312-363
ppm
500
N
Erosion of natural deposits
Total Phosphorus(P)
07/00
.030-.050
Silica
07/00
23-24
ppm
5.0
N
Erosion of natural deposits
Corrosivity
07/00
.018-.077
LI
0-+1.0
N
Erosion of natural deposits
Zinc
07/00
.022-.058
ppm
5.0
N
Erosion of natural deposits
As you can see by the table, your water system had no violations. Your water system meets or exceeds all federal and state requirements and is safe.

"The City works diligently to provide top Quality water to every Citizen" said City Superintendent Chad Nystrom. "We ask that all our customers help us protect our water sources, which are the heart of our community, our way of life and our children's future".

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