US PATENT NO. 11,035,105
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University Park, Illinois

Residential Pilot

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Location: University Park, IL
Pilot Partner: Aqua Illinois (local water utility)
Scope: 9 homes tested

8 of 9 homes saw lead drop well below EPA’s 15 ppb action level

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Pre‑Noah lead levels

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4 homes exceeded 200 ppb
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1 home at 150 ppb
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3 homes above 50 ppb
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Only 1 home under EPA action level (15 ppb)
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Challenge

In late 2018 and 2019, Aqua Illinois detected elevated lead levels in homes throughout University Park, sparking a “Do Not Consume” advisory and prompting residents to rely on bottled water for years. With mounting public distrust and growing legal pressures surrounding lead contamination, Aqua Illinois sought a scalable, effective residential solution—without resorting to bottle distribution or expensive home re-piping.

Solution

In 2020, Aqua Illinois selected Noah’s auto-flushing system for a 9-home pilot. Each home received a Noah device installed at the kitchen faucet. This pilot tested whether automated flushing could rapidly lower lead levels in a residential contex —with no filters, no infrastructure overhaul.

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Result

The outcomes were dramatic and conclusive:

  • 8 of 9 homes saw lead drop well below EPA’s 15 ppb action level
  • The one home that remained slightly elevated (~50 ppb) had experienced a power interruption, which disabled the Noah device
  • This underlined the importance of uninterrupted operation, not a system flaw

Overall, Noah’s system produced substantial, consistent reductions in lead levels—demonstrating its effectiveness in typical residential plumbing

Chart showing lead levels before and after Noah systems were installed
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Key Takeaways for School Districts & Cities

Capitalize on proven tech:

Residential success mirrors school results—orthophosphate protection works in both contexts

Deploy anywhere:

From large districts to single-family homes, automated flushing delivers rapid, accurate results.

Low overhead, high impact:

Minimal installation, no filters, no continuous labor—just reliable water quality.