Water Services

Backflow Program 
Buffalo Grove is dedicated to protecting the public water supply from contamination by toxic substances.


If you have recently purchased a home, you may notice a device like the photo below mounted on the side of your house. This is the backflow device for your irrigation system. This device is important because it protects the public water supply from contamination. This device requires yearly testing by a cross connection control inspector.


This is an example of an RPZ type backflow device, mounted on the side of a single family home.  The device itself is highlighted in red.

Help! I received a letter from a company called "BSI".

We are happy to discuss homeowner responsibilities related to backflow devices in irrigation and fire safety systems that are connected to the public water supply. Click here to submit a request.
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Buffalo Grove has contracted with Backflow Solutions, Inc. (BSI) to manage the backflow inspection program. BSI has experience managing similar programs for municipalities across the Chicagoland area. BSI serves as the primary contact for backflow inspections within the Village.

Water Customer Contact Information:

Testing Company/Tester Contact Information:

If you receive a letter from BSI, it is being sent on behalf of Buffalo Grove. Please do not discard it.

You have questions, we have answers:

Boil Orders

Help! I have a boil order question

Please call Public Works at (847) 459-2545 from 7:00 am to 3:30 pm, Monday through Friday. If you have an after hours question, please feel free to call the non-emergency Police number (847) 459-2560 and they will put you in contact with a member of Public Works. If your question is not immediate, you can also submit it online using the button to the right.
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A boil order is most commonly issued when Public Works crews need to shut down a segment of water main due to an emergency water main break or other maintenance activity.  Illinois rules and regulations call for the immediate issuance of a boil order for any emergency which results in water pressures falling below 20 pounds per square inch.  The boil order in this case is precautionary and does not mean that the water has tested positive for microbiological contamination.  It is simply a precautionary measure until proper testing can be completed.  Notification is made by Public Works to those consumers affected.

During the day, Public Works staff will go door-to-door to issue boil order notification.  If a customer is not home, a RED door tag will be left on the front door.  An additional tag will be left near the garage or other conspicuous location in case a home owner does not normally enter through their front door.

Sometimes, a boil issue needs to be issued overnight.  The Village does not have the ability to target specific addresses via phone or email contact. In the precautionary scenario above, Public Works will not ring door bells in the late evening or overnight hours, but will simply hang door tags for the residents to see in the morning.  If the water is ever confirmed to be contaminated, much more notification will take place including news and media outlets, reverse-911 calls, and other methods.  But for a precautionary boil order with no confirmed contamination, only the door tags will be hung overnight.

You have questions, we have answers:

Getting Water to your Home 

Help! There's water coming up in my yard

If you have an emergency request for Public Works, please contact us at 847-459-2545 during regular business hours, or at the Police non-emergency number at 847-459-2560 nights and weekends. If the concern is not immediate, please submit an online request here.
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Our water comes from Lake Michigan.  Buffalo Grove purchases the water from the Northwest Water Commission. The water goes to our four pumping stations and reservoirs throughout the Village. Finally the water reaches customers via 181 miles of underground water main.

Buffalo Grove owns and maintains the water mains that distribute water to your home. Buffalo Grove also owns the meter that reads the water usage. In any instance where these fail, the Water Section will make the necessary repairs.

At the water main, there is a tap for the resident’s private service line. A device called a corporation stop (corp) connects the copper service line to the buffalo box (bbox). The copper service line then travels from the bbox to the water meter located in the house. The service line then connects to internal plumbing. 

It is the homeowner’s responsibility for maintenance and repairs to the service line. This includes the connection to the water main, the bbox, and any leaks. Buffalo Grove will make repairs to any faulty water meters.  The Water Section has the ability to detect the location of a leak.  This could help determine if the leak is on the Village water main or private service.

how water gets to your home

Hydrant Flushing

Why is hydrant Flushing done?

  • Reduce water age in pipes
  • Improve Disinfectant residual concentrations
  • Cleans Pipes
  • Prevents Taste and color issues
  • Makes sure hydrants operate effectively
  • System wide check of flows and pressures

When will hydrants on my street be flushed?

Learn more using our interactive locater, click on the search bar (top right corner) and type in your address. 
The different colored dots on the map will indicate whether or not the flushing is still planned or has been completed.

Water Quality 

Help! I have questions about water quality

A member of the Water Section would be happy to answer your questions. Please call Public Works at 847-459-2545 from 7:00 am to 3:30 pm, Monday through Friday, or submit an online request here.
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Please click here for a letter to all Buffalo Grove Water Customers in regards to the Village's test results and requirements as they pertain to perfluoroalkyls. Buffalo Grove sources its water from the Northwest Water Commission which purchases treated water from the City of Evanston.  If you want to know more about these chemicals and their presence in drinking water, please see this attached letter from Evanston’s Water Production Bureau Chief. The City of Evanston also created the following page which summarizes PFAS sampling results HERE.
The Consumer Confidence Report, also known as the Water Quality Report, is prepared and distributed annually by all public water systems to their customers as mandated per amendments to the Safe Drinking Water Act. The report is compiled by July 1 for the previous Year.

Water Conservation and Leak Detection

Did you know that we review water overage, that could be due to leaks?

We may even give you a call before you get your first high water bill. It is important to keep your contact information up to date, in the event we need to reach you. 
Please visit our Water and Sewer Utility Billing page for more information or give us a call at 847-459-2500.

Frequently Asked Questions


Connecting my Sump Pump to the Storm Sewer 
If you are having drainage or flooding problems, there may be a better way!

If you are not connected to the Village storm sewer, this may be the option for you.

Sump Pump Connection Image
1)  Review the sump pump connection handout.

2) Email Jon Nero with your address so he can review the utility maps to see if there is an inlet nearby.

3) Register for a BS& A online account.
Anyone interested in applying for a sump pump connection permit must be registered.

CONTRACTORS ONLY: Please fill out the Contractor Registration Application and email to permits @vbg.org. You will not be able to apply for a permit with contractor registration.
-Working more than 5' from the foundation will require a sewer contractor registration for sump pump connections.
-The annual Contractor Registration fee is $100.00.

Registering for a BS&A online account will allow you to apply, track, and request an inspection online. You will be able to track this permit along with any other permits you have through the Building Department.