2022 Consumer Confidence Report

2022 Consumer Confidence Report

2022 Consumer Confidence Report reported in 2023

ANNUAL DRINKING WATER QUALITY REPORT

VILLAGE OF MAHOMET, ILLINOIS

For the period of January 1 to December 31, 2022

This year, as in years past, your tap water met all USEPA and State drinking water health standards, our system vigilantly
safeguards its groundwater supply, and we are able to report that the department had NO violation of a contaminant level or of any other water quality standard in the previous year.

This report summarized the quality of water that we provided last year, including details about where your water comes
from, what it contains, and how it compares to standards set by regulatory agencies.

Due to favorable monitoring history, aquifer characteristics, and inventory of potential sources of contamination, our water supply was issued a vulnerability waiver renewal.  No monitoring for VOC’s and SOC’s is required between January 1, 2022 and December 31, 2022.

For more information regarding this report, contact: Jason Heid, Water/Wastewater Superintendent at 217/586-3554 or Email Jason Heid

PFAS Detections

In 2021, our PWS was sampled as part of the State of Illinois PFAS Statewide Investigation. Eighteen PFAS compounds were samples, and none were detected in our finished drinking water. For more information about PFAS health advisories https://epa.illinois.gov/ 

In 2021, our PWS was sampled as part of the State of Illinois PFAS Statewide Investigation. Eighteen PFAS compounds were sampled, and none were detected in our finished drinking water. For more information about PFAS health EPA.

Source of Drinking Water

The Village of Mahomet uses groundwater provided by three wells, drilled into the Mahomet aquifer.  An aquifer is a geological formation that contains water.  All three of the wells are located within the Village limits.  Wells #4, #5, & #6 are all utilized on a daily basis.  Water from the wells is pumped to the treatment plant, for filtration, softening, fluoridation and chlorination.

The sources of drinking water (both tap and bottled water) include rivers, lakes, streams, ponds, reservoirs, springs and groundwater 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, such as viruses and bacteria, which may come from sewage treatment plants, septic systems, agricultural livestock operations and wildlife.

Inorganic contaminants, such as salt and metals, which can be naturally occurring or result from urban storm water runoff, industrial, or domestic wastewater discharges, oil and gas production, mining or farming.

Pesticides and herbicides, which may come from a variety of sources such as agriculture, urban storm water runoff, and residential uses.

Organic chemical contaminants, including synthetic and volatile organic chemicals, which are by-products of industrial processes and petroleum production, and can also come from gas stations, urban storm water runoff, and septic systems.

Radioactive contaminants, which can be naturally-occurring or be the result of oil and gas production and mining activities.

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 EPA’s Safe Drinking Water
Hotline at (800) 426-4791.

In order to ensure that tap water is safe to drink, EPA prescribes regulations which limit the amount of certain contaminants in water provided by public water systems.  FDA regulations establish limits for contaminants in bottled water which must provide the same protection for public health.  Some people may be more vulnerable to contaminants in drinking water than the general population. Immuno-comprised persons such as 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.  EPA/CDC guidelines on appropriate means to lessen the risk of infection by Cryptosporidium and other microbial contaminants are available from the Safe Drinking Water Hotline (800-426-4791).

Immuno-compromised persons such as 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 EPA/CDC guidelines on appropriate means to lessen the risk of infection by Cryptosporidium and other microbial contaminants are available from the Safe Drinking Water Hotline (800-426-4791).

If present, elevated levels of lead can cause serious health problems, especially for pregnant women and young children. 
Leak in drinking water is primarily from materials and components associated with service lines and home plumbing.  We cannot control the variety of materials used in plumbing components.  When your water has been sitting for several hours, you can minimize the potential for lead exposure by flushing your tap for 30 seconds to 2 minutes before using water for drinking or cooking.  If you are concerned about lead in your water, you may wish to have your water tested.  Information on lead in drinking water, testing methods, and steps you can take to minimize exposure is available from the Safe Drinking Water Hotline or at EPA.

Source Water Information

Source Water Name

Type of Water

Report Status

WELL 4 (00667)

GW

Active

WELL 5 (00668)

GW

Active

WELL 6 (01756)

GW

Active

A Source Water Assessment summary is included below for your convenience.

We want our valued customers to be informed about their water quality.  If you would like to learn more, please feel welcome to attend any of our regularly scheduled meetings, on the second Tuesday of each month at 6:00 p.m. at the Village Administration Office, 503 E. Main Street.

The source water assessment for our supply has been completed by the Illinois EPA.  If you would like a copy of this information, please stop by Village Hall or call our Water Operator at 217/586-3554.  To view a summary version of the completed Source Water Assessments, including, Important of Source Water; Susceptibility to Contamination Determination and documentation/recommendation of Source Water Protection Efforts, you may access the Illinois EPA website at Epa.

Based on information obtained in a Well Site Survey, published in 1989 by the Illinois EPA, one potential secondary source (also an on-going leaking underground tank remediation site) is located 840 feet from Well #4 and 740 feet from Well #5. 
Furthermore, information provided by the Leaking Underground Storage Tank Section of Illinois EPA indicated several additional sites with on-going remediation which may be of concern.  However, these sites have not been field verified by the Groundwater Section staff and may or may not be located in proximity to the Village’s source water protection area.

The Illinois EPA has determined that the Mahomet Community Water Supply’s source water has a low susceptibility to contamination.  This determination is based on a number of criteria including monitoring conducted at the wells’ monitoring conducted at the entry point to the distribution system, and the available hydrogeologic data on the wells.

In anticipation of the U. S. EPA's proposed Ground Water Rule, the Illinois EPA has determined that the Mahomet Community Water Supply has a low susceptibility to viral contamination.  This determination is based upon the completed evaluation of the following criteria during the Vulnerability Waiver Process: the community's wells are properly constructed with sound integrity and proper site conditions; a hydrogeologic barrier exists that prevents pathogen movement; all potential routes and sanitary defects have been mitigated such that the source water is adequately protected; monitoring data did not indicate a history of disease outbreak; and the sanitary survey of the water supply did not indicate a viral contamination threat.  Because the community's wells are constructed in a confined aquifer, that could minimize the movement of pathogens into the wells, well hydraulics were not considered to be a significant factor in the susceptibility
determination.  Hence, well hydraulics were not evaluated for this groundwater supply.

2022 Regulated Contaminants Detected Lead and Copper

  • Definitions: Action Level Goal (AGL): The level of a contaminant in drinking water below which there is no known or expected risk to health. ALGs allow for a margin of safety.

  • Action level: The concentration of a contaminant which, if exceeded, triggers treatment or other requirements which a water system

Lead/Copper

Date Sampled

MCLG

Action Level

90%

# Sites Over All

Units

Violation

Likely Source of Contamination

Copper

07/08/2021

1.3

1.3

1.1

0

ppm

No

Erosion of natural deposits; Leaching from wood preservatives; Corrosion of household plumbing systems.

Lead

07/08/2021

0

15

2.7

1

ppb

No

Corrosion of household plumbing systems; Erosion of natural deposits.

Water Quality Test Results

Definitions: The following tables contain scientific terms and measures, some of which may require explanation.

  • Avg:
    Regulatory compliance with some MCLs are based on running

  • Level 1 Assessment:
    A Level 1 assessment is a study of the water system to identify potential problems and determine (if possible) why
    total coliform bacteria have been found in our water system.

  • Level 2 Assessment:
    A Level 2 assessment is a very detailed study of the water system to identify potential problems and determine
    (if possible) why an E. coli MCL violation has occurred and/or why total coliform bacteria have been found in our
    water system on multiple occasions.

  • Maximum Contaminant Level (MCL):
    The highest level of a contaminant that is allowed in drinking water. MCL's are set as close to the Maximum
    Contaminant Level Goal as feasible using the best available treatment technology.

  • Maximum Contaminant Level Goal (MCLG):
    The level of a contaminant in drinking water below which there is no known or expected risk to health. MCLG's
    allow for a margin of safety.

  • Maximum Residual Disinfectant Level (MRDL): The highest level of a disinfectant allowed in drinking water.
    There is convincing evidence that addition of a disinfectant is necessary for control of microbal contaminents.

  • Maximum Residual Disinfectant Level Goal (MRDLG): The level of drinking water disinfectant below which there is no
    known or expected risk to health. MRDLG's do not reflect the benefits of the use of disinfectants to control microbal
    contaminants.

Glossary:

na

not applicable

mrem

millirems per year (a measure of radiation absorbed by the body)

ppb

micrograms per liter or parts per billion - or one ounce in 7.350,000 gallons of water

ppm

milligrams per liter or parts per million - or one ounce in 7.350,000 gallons of water

TT

Treatment Technique(A required process intended to reduce the level of a contaminant in drinking water.)

Regulated Contaminants

Disinfectants & Disinfection By-Products

 

Collection Date

Highest Level

Range of Levels

MCLG

MCL

Units

Violation

Likely Source of Contamination

Chlorine

    12/31/2022

1.1

0.9-1.3

MRDLG=4

MRDL=4

ppm

No

Water additive used to control microbes

Haloacetic Acids
(HAA5)

2022

47

31.6-46.5

No goal for the total

60

ppb

No

By-product of drinking water disinfection

Total Haloacetic acids
(HAA5)

2022

52

44.1-52.2

No goal for the total

80

ppb

No

By-product of drinking water disinfection

Inorganic Contaminants

 

Collection Date

Highest Level

Range of Levels

MCLG

MCL

Units

Violation

Likely Source of Contamination

Barium

1/12/2021

0.028

0.028-0.028

2

2

ppm

no

Discharge of drilling wastes; Discharge from metal refineries; Erosion of natural deposits

Fluoride

5/10/2022

1.17

.49-1.17

4

4.0

ppm

No

Erosion of natural deposits; Water additive which promotes strong teeth; Discharge from fertilizer and aluminum factories.

Manganese

01/12/2021

3.5

3.5-3.5

150 

150

ppm

No

This contaminant is not currently regulated by the USEPA.  However, the state regulates. Erosion of natural deposits

Nitrate(Nitrogen)

2022

1

1.2 - 1.2

10

10

ppm

No

Runoff from fertilizer use; Leaching from septic tanks, sewage, Erosion of natural deposits.

Sodium

01/12/2021

130

130 - 130

 

 

ppm

No

Erosion from naturally occurring deposits: Used in water softener regeneration.

Note: The state requires monitoring of certain contaminants less than once per year because the concentrations of these contaminants do not change frequently. Therefore, some of this data may be more than one year old.   

 

 Violations Table

Lead and Copper Rule

The Lead and Copper Rule protects public health by minimizing lead and copper levels in drinking water, primarily by reducing water corrosivity. Lead and copper enter drinking water mainly from corrosion of lead and copper containing plumbing materials. 

Violation Type

Violation Begin

Violation End 

Violation Explanation

LEAD CONSUMER NOTICE (LCR)

02/01/2022

03/23/2022

We failed to provide the results of lead tap water monitoring to the consumers at the location water was tested. These were supposed to be provided no later than 30 days after learning the results/