Short answer
Chicago gets its water from City of Chicago Department of Water Management, measured at 142 mg/L (hard on the USGS scale). Hard water speeds up sediment buildup in a tank, so flushing and anode checks matter more here.
Chicago at a glance
| Water utility | City of Chicago Department of Water Management Source |
|---|---|
| Water hardness | 142 mg/L (hard on the USGS scale) Source |
| Water heater permit | No permit for repairing or replacing (in-kind) a hot water heater in a residential building up to 4 stories; otherwise Express Permit Program eligible. Chicago-licensed and bonded plumbing contractor; exception lets an owner/occupant/lessee do the work personally (code + inspection) but not hire anyone unlicensed Source |
| Gas utility | Peoples Gas Source |
| Utility rebates | Peoples Gas Home Energy Rebate Program, HVAC and Water Heating application, valid Jan 1-Dec 31 2026: $150 tankless (power vented, >= 0.95 UEF); $150 indirect water heater paired with condensing modulating boiler >= 88% AFUE. Rules: must replace a standard-efficiency, atmospherically vented gas storage tank; Service Classification 1 account; application within 30 days of install or by 12/31/2026; AHRI certificate required. Standard tank-for-tank replacements do not qualify. Source |
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Water Heater Facts is an independent information service run by Strive LeadGen LLC. Local facts come from city, county and utility sources linked above; rules change, so confirm with the city before you start. Ratings and review counts change daily and are shown as of the date checked.