Section 179-25-024 - RECORDKEEPING REQUIREMENTS024.01 Systems must keep results from source water monitoring until three years after bin classification for filtered systems or determination of the mean Cryptosporidium level for unfiltered systems for the particular round of monitoring.024.02 Systems must keep any notification to the Department that they will not conduct source water monitoring due to meeting the criteria of 179 NAC 25-004.03 or 40 CFR 141 Subpart W for three years.024.03 Systems must keep the results of treatment monitoring associated with microbial toolbox options under 179 NAC 25-018 through 179 NAC 25-022 and with uncovered finished water reservoirs under 179 NAC 25-016, as applicable, for three years.179 Neb. Admin. Code, ch. 25, § 024