US PATENT NO. 11,035,105
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Case Study / Chicago, IL. USA

Orr High School

Orr High School had a big problem - lead levels in many of the school’s drinking water outlets exceeded the EPA allowable limit, including one that was 200 times the maximum!

1

Challenge

One-third of the drinking water outlets tested exceeded the EPA limit of 15 parts per billion (PPB), with the highest at almost 3000 PPB.

Chicago Public Schools’ policy dictates that when levels in any individual drinking water outlet exceed 15 PPB, students’ parents and legal guardians must be contacted and made aware of the issue. This raises major health and safety concerns for students and their families, and future liability concerns for the school and administrators.

2

Solution

Orr High School’s staff struggled for nearly a year before finding a viable means of controlling the issue.

In September 2017, eighteen Noah Water Quality Maintenance units were installed across the school’s 36 drinking water outlets after classes had ended for the day. Units flushed each drinking water outlet for one minute every two hours.

3

Results

Literally overnight, the device took lead from unlawful to undetectable levels... and a legend was born.

PRE-NOAH LEAD LEVELS (10/16)
9.130 PPB Ave Per Test
2.000 Median PPB
POST-NOAH LEAD LEVELS (03/18)
0.811 PPB Ave Per Test
0.505 Median PPB