Nebraska Administrative Code
Topic - HEALTH AND HUMAN SERVICES SYSTEM
Title 179 - PUBLIC WATER SYSTEMS
Chapter 16 - DISINFECTANTS AND DISINFECTION BYPRODUCTS
Attachment 1

A. Time Periods - Public water systems using only groundwater sources that use chlorine, chloramines, chlorine dioxide, or ozone as any part of the treatment or system maintenance process are required to test for disinfection byproducts (DBPs) under the requirements of the Disinfectants/Disinfection Byproducts Rule unless levels of Total Organic Carbon (TOC) for all sources are <= 2 mg/L and the use of chlorine or chloramines is limited to usage for a period not longer than 30 consecutive days; or 45 total cumulative days for each calendar year.

B. Groundwater systems using chlorination for maintenance purposes as defined in I.A. above, or in response to a specific event in the distribution system are exempt from the disinfectant residual requirements set in Attachment 2 to 179 NAC 16.

C. Reporting - Public water systems using only groundwater that are adding chlorine or chloramines for maintenance purposes, or in response to a specific event in the distribution system, must submit a report for each month in which chlorine or chloramines are used. The report must contain the daily total flows, source of chlorine, percent of available chlorine, the pounds or gallons of solution added for each day, and an explanation of why the chemical was used. The report must be submitted within 10 days of the end of the month in which chlorine or chloramines were used.

D. Day of Disinfection Definition - Any portion of a 24 hour period, from 12:00 a.m. to 11:59 p.m., that chlorine or chloramines are added to the system's water is considered a day of disinfection. The total number of days of disinfection will be determined from the time the maintenance practice begins until the practice has ceased.

E. Regardless of the duration for which chlorine or chloramines are used, the Maximum Residual Disinfectant Level must not exceed 4.0 mg/L except as allowed in 179 NAC 16-003.05.