WATER SUPPLIER
Markham's published water source
Purchased Surface Water; the report’s source-water information lists a lake source and surface-water (SW) type.
Source: Markham Annual Drinking Water Quality Report 2025 (2025)
MARKHAM, ILLINOIS • COOK COUNTY
Water Softener and Filtration in Markham, IL
Markham's current official water report identifies the municipal supply as Purchased Surface Water. Its source-water information lists a lake source and surface-water (SW) type. This is useful system context, but it is not a diagnosis of water or plumbing at a particular Markham address. A utility report describes the public system. It is not a reading from one home's tap, where plumbing, fixtures, sample location, and existing treatment can change the experience.
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LOCAL WATER NUMBERS
What Markham's report lists
- The City of Markham's 2025 Annual Drinking Water Quality Report identifies Markham's drinking-water source as Purchased Surface Water.
- The report's source-water information lists a lake source and identifies the water type as surface water (SW).
This report does not publish a hardness figure. Ask us to test your water instead of using a guessed number.
This municipal Consumer Confidence Report describes the public water system and its reported source information. It does not establish water conditions, plumbing materials, or treatment needs at an individual Markham home.
Source: Markham Annual Drinking Water Quality Report 2025 (2025)
HOMES IN THIS AREA
Markham's housing age context
The 2020-2024 ACS estimate puts the median year built for Markham housing units at 1964, a mid-century housing era. That is context for discussing plumbing access, fixture age, and updates at a specific address, not a condition report for any one home.
MORE LOCAL SERVICE AREAS
Nearby towns we serve
Back to service areasTreatment Options
Options for a whole-home project
We begin with your goals, home layout, plumbing, and available space. We do not use a municipal report alone to decide what a home needs.
- Whole-home water softeners for homeowners seeking a softening option.
- Whole-home carbon filtration for homeowners interested in carbon filtration throughout the home.
- Salt-free conditioning where it fits the home and the homeowner's goals.
- Well-water treatment only after laboratory results or a confirmed field test.
- Kitchen tank or tankless reverse osmosis only as an add-on to a whole-home installation.
Local Questions
Markham water-treatment questions
Town FAQ source: Markham Annual Drinking Water Quality Report 2025 (2025)
What source does Markham’s official 2025 report identify for the municipal system?
The report identifies Markham’s municipal source as Purchased Surface Water. Its source-water information lists a lake source and identifies the water type as surface water (SW).
Does the report identify the water as surface water or groundwater?
It identifies the source as purchased surface water. The report's source-water information also lists surface water (SW) and a lake source.
Does the municipal report tell me what is happening at my Markham faucet?
No. It describes the public system and reported source information, not conditions at an individual home. Plumbing, service lines, fixtures, and on-site conditions can vary by address.
Can reverse osmosis be included for my Markham kitchen?
Kitchen tank or tankless reverse osmosis can be included only as an add-on to a whole-home installation. We will review placement and installation details for your home.
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