WATER SUPPLIER
Evanston's published water source
Evanston’s 2025 Annual Water Quality Report identifies Lake Michigan as the City’s surface-water source.
Water treatment in Evanston
Water Softener and Filtration in Evanston, IL
The latest Evanston 2025 Annual Water Quality Report says Evanston's public water system met the standards described in that report. 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 Evanston's report lists
- Its additional-information table lists average hardness of 134 mg CaCO3/L (7.8 grains per gallon), with a reported range of 128–143 mg CaCO3/L (7.5–8.4 grains per gallon).
- For 2025 lead sampling, the table lists an 8 ppb 90th-percentile lead result, zero sites over the 15 ppb action level, and no violation.
Hardness has no EPA health limit. It is mainly useful for discussing scale, fixtures, soap use, and how water feels in daily use.
This system-wide municipal report and its sampling results do not establish water conditions, plumbing materials, or treatment needs at a particular Evanston home. Conditions at the tap can be affected by a home's service line, plumbing, fixtures, and any existing equipment.
HOMES IN THIS AREA
Evanston's housing age context
The 2020-2024 ACS estimate puts the median year built for Evanston housing units at 1953, 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 all service areasTreatment Options
Whole-home and kitchen drinking-water options
We match an Evanston installation to the home, the owner’s priorities, plumbing, and available space. Recommendations follow an on-site conversation rather than assumptions from a municipal report.
- Whole-home water softeners for homeowners seeking a softening solution.
- Whole-home carbon filtration for homeowners exploring carbon-filtration options.
- Salt-free conditioning where it fits the home and homeowner’s goals.
- Well-water treatment only after laboratory results or a confirmed field test.
- Tank or tankless kitchen reverse osmosis, available only as an add-on to a whole-home installation.
Local Questions
Evanston water treatment FAQs
Town FAQ source: Evanston 2025 Annual Water Quality Report (2025)
Where does Evanston’s public water come from?
Evanston’s 2025 Annual Water Quality Report identifies Lake Michigan as the City’s surface-water source. That report describes the public system; it does not determine conditions at a particular Evanston faucet.
What hardness does Evanston’s current report list?
Evanston’s 2025 report lists average hardness of 7.8 grains per gallon, with a reported range of 7.5–8.4 grains per gallon. Those are system-report values, not a measurement of the water in an individual home.
Did Evanston’s report show compliance in 2025?
The 2025 Annual Water Quality Report states that Evanston maintained compliance with all state and federal drinking-water regulations in 2025. The report is a system-wide summary and does not establish the condition of a home’s plumbing or water at the tap.
Can I add kitchen reverse osmosis to a whole-home project in Evanston?
Yes. Tank or tankless kitchen reverse osmosis is available as an add-on when paired with a whole-home installation. We first review the Evanston home’s plumbing, space, and project goals.
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