TapMatch

Oak Run, Illinois

Aqua Illinois — Oak Run 2025 Consumer Confidence Report (IL0955200). Cover name is taken from the official Aqua system title. The opened report does not print a usable hardness-as-CaCO3 number in the extracted text. This file does not invent one. The booklet says this water is disinfected using chlorine. Chlorine residual 0.5 ppm on the labeled table, MRDL 4. No Measure S-style residential softener ban turned up.

Cited chemistry for Oak RunA chart of numbers printed on the utility report, each labeled with its unit. Missing numbers are left off.Chlorine0.5 ppmWQR
Cited numbers from the utility report. Length follows the printed value against a labeled scale — not a health ranking. If the report has no number, it is not on the chart.
  1. Chlorine0.5 ppm

Best match for Oak Run

Whole-house carbon for chlorine

No district prohibition on a brine drain turned up in the current file.

A single black whole-house carbon tank with a control head, installed in a garage and connected to copper pipe.
Whole-house carbon tank. No brine tank.

That is chlorine. A whole-house carbon filter with an NSF/ANSI 42 chlorine claim is the usual match. A softener will not take chlorine out.

Shop whole-house carbon

Also for the kitchen

Under-sink reverse osmosis

Under-sink reverse osmosis system with a white storage tank, filter canisters, and colored tubing in a kitchen cabinet.
Under-sink reverse osmosis: filters, tank, and a second faucet.

The under-sink RO we actually run is Cloud RO — NSF/ANSI 58, kitchen tap, not a whole-house tank. Check the exact listing if PFAS is why you are shopping. Shop Amazon first for under-sink RO, or buy Cloud direct. Waterdrop is a tankless option if you want that path. A certifier-listed pitcher is the cheap first step. Nobody is paying for a medical claim.

Shop under-sink reverse osmosisBuy Cloud RO directShop Waterdrop reverse osmosisShop PFAS-listed pitchers

Some links are affiliate links. If you buy through one, we may earn a commission. That does not change the match, and it is not a medical claim.

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Other options that still fit

On the report

Water utility
Aqua Illinois — Oak Run
Hardness
The opened report does not print a usable hardness-as-CaCO3 number in the extracted text. This file does not invent one. — 2025 Water Quality Report (AQUA ILLINOIS-OAK RUN, IL0955200)
Disinfectant
The booklet says this water is disinfected using chlorine. Chlorine residual 0.5 ppm on the labeled table, MRDL 4. — 2025 Water Quality Report (AQUA ILLINOIS-OAK RUN, IL0955200)
Brine / salt to the sewer
No district prohibition found in current research. Searched city water and sewer pages for a residential self-regenerating softener or brine-drain ban like LACSD Measure S. None turned up. Ask the sewer agency on the bill before you cut a brine drain.

Also around here

Extra context besides the utility report and the chart above — geology, an unregulated table, or a published study. Not a second set of printed tap numbers.

Oak Run drinking water on this file is Aqua Illinois — Oak Run. Searched city water and sewer pages for a residential self-regenerating softener or brine-drain ban like LACSD Measure S. None turned up. Ask the sewer agency on the bill before you cut a brine drain. This is not a legal opinion.

The opened report prints The opened report does not print a usable hardness-as-CaCO3 number in the extracted text. This file does not invent one. The booklet says this water is disinfected using chlorine. Chlorine residual 0.5 ppm on the labeled table, MRDL 4. Kitchen shopping stays the Cloud RO / Waterdrop path already used on other cities if a listing is why you are looking.

Sources

  1. 2025 Water Quality Report (AQUA ILLINOIS-OAK RUN, IL0955200) — Aqua Illinois. Accessed 2026-09-11.

Updated September 11, 2026. A city file is chemistry we can cite plus the sewer rule. No invented detections.