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e-CFR data is current as of September 24, 2020

Title 40Chapter ISubchapter DPart 141Subpart W → §141.721


Title 40: Protection of Environment
PART 141—NATIONAL PRIMARY DRINKING WATER REGULATIONS
Subpart W—Enhanced Treatment for Cryptosporidium


§141.721   Reporting requirements.

(a) Systems must report sampling schedules under §141.702 and source water monitoring results under §141.706 unless they notify the State that they will not conduct source water monitoring due to meeting the criteria of §141.701(d).

(b) Systems must report the use of uncovered finished water storage facilities to the State as described in §141.714.

(c) Filtered systems must report their Cryptosporidium bin classification as described in §141.710.

(d) Unfiltered systems must report their mean source water Cryptosporidium level as described in §141.712.

(e) Systems must report disinfection profiles and benchmarks to the State as described in §§141.708 through 141.709 prior to making a significant change in disinfection practice.

(f) Systems must report to the State in accordance with the following table for any microbial toolbox options used to comply with treatment requirements under §141.711 or §141.712. Alternatively, the State may approve a system to certify operation within required parameters for treatment credit rather than reporting monthly operational data for toolbox options.

Microbial Toolbox Reporting Requirements

Toolbox option Systems must submit the following information On the following schedule
(1) Watershed control program (WCP)(i) Notice of intention to develop a new or continue an existing watershed control programNo later than two years before the applicable treatment compliance date in §141.713
   (ii) Watershed control planNo later than one year before the applicable treatment compliance date in §141.713.
   (iii) Annual watershed control program status reportEvery 12 months, beginning one year after the applicable treatment compliance date in §141.713.
   (iv) Watershed sanitary survey reportFor community water systems, every three years beginning three years after the applicable treatment compliance date in §141.713. For noncommunity water systems, every five years beginning five years after the applicable treatment compliance date in §141.713.
(2) Alternative source/intake managementVerification that system has relocated the intake or adopted the intake withdrawal procedure reflected in monitoring resultsNo later than the applicable treatment compliance date in §141.713.
(3) PresedimentationMonthly verification of the following: (i) Continuous basin operation (ii) Treatment of 100% of the flow (iii) Continuous addition of a coagulant (iv) At least 0.5-log mean reduction of influent turbidity or compliance with alternative State-approved performance criteriaMonthly reporting within 10 days following the month in which the monitoring was conducted, beginning on the applicable treatment compliance date in §141.713.
(4) Two-stage lime softeningMonthly verification of the following: (i) Chemical addition and hardness precipitation occurred in two separate and sequential softening stages prior to filtration (ii) Both stages treated 100% of the plant flowMonthly reporting within 10 days following the month in which the monitoring was conducted, beginning on the applicable treatment compliance date in §141.713.
(5) Bank filtration(i) Initial demonstration of the following: (A) Unconsolidated, predominantly sandy aquifer (B) Setback distance of at least 25 ft. (0.5-log credit) or 50 ft. (1.0-log credit)No later than the applicable treatment compliance date in §141.713.
   (ii) If monthly average of daily max turbidity is greater than 1 NTU then system must report result and submit an assessment of the cause.Report within 30 days following the month in which the monitoring was conducted, beginning on the applicable treatment compliance date in §141.713.
(6) Combined filter performanceMonthly verification of combined filter effluent (CFE) turbidity levels less than or equal to 0.15 NTU in at least 95 percent of the 4 hour CFE measurements taken each monthMonthly reporting within 10 days following the month in which the monitoring was conducted, beginning on the applicable treatment compliance date in §141.713.
(7) Individual filter performanceMonthly verification of the following: (i) Individual filter effluent (IFE) turbidity levels less than or equal to 0.15 NTU in at least 95 percent of samples each month in each filter (ii) No individual filter greater than 0.3 NTU in two consecutive readings 15 minutes apartMonthly reporting within 10 days following the month in which the monitoring was conducted, beginning on the applicable treatment compliance date in §141.713.]
(8) Demonstration of performance(i) Results from testing following a State approved protocol
(ii) As required by the State, monthly verification of operation within conditions of State approval for demonstration of performance credit
No later than the applicable treatment compliance date in §141.713.
Within 10 days following the month in which monitoring was conducted, beginning on the applicable treatment compliance date in §141.713.
(9) Bag filters and cartridge filters(i) Demonstration that the following criteria are met: (A) Process meets the definition of bag or cartridge filtration; (B) Removal efficiency established through challenge testing that meets criteria in this subpartNo later than the applicable treatment compliance date in §141.713.
   (ii) Monthly verification that 100% of plant flow was filteredWithin 10 days following the month in which monitoring was conducted, beginning on the applicable treatment compliance date in §141.713.
(10) Membrane filtration(i) Results of verification testing demonstrating the following: (A) Removal efficiency established through challenge testing that meets criteria in this subpart; (B) Integrity test method and parameters, including resolution, sensitivity, test frequency, control limits, and associated baselineNo later than the applicable treatment compliance date in §141.713.
   (ii) Monthly report summarizing the following: (A) All direct integrity tests above the control limit; (B) If applicable, any turbidity or alternative state-approved indirect integrity monitoring results triggering direct integrity testing and the corrective action that was takenWithin 10 days following the month in which monitoring was conducted, beginning on the applicable treatment compliance date in §141.713.
(11) Second stage filtrationMonthly verification that 100% of flow was filtered through both stages and that first stage was preceded by coagulation stepWithin 10 days following the month in which monitoring was conducted, beginning on the applicable treatment compliance date in §141.713.
(12) Slow sand filtration (as secondary filter)Monthly verification that both a slow sand filter and a preceding separate stage of filtration treated 100% of flow from subpart H sources.Within 10 days following the month in which monitoring was conducted, beginning on the applicable treatment compliance date in §141.713.
(13) Chlorine dioxideSummary of CT values for each day as described in §141.720.Within 10 days following the month in which monitoring was conducted, beginning on the applicable treatment compliance date in §141.713.
(14) OzoneSummary of CT values for each day as described in §141.720.Within 10 days following the month in which monitoring was conducted, beginning on the applicable treatment compliance date in §141.713.
(15) UV(i) Validation test results demonstrating operating conditions that achieve required UV dose
(ii) Monthly report summarizing the percentage of water entering the distribution system that was not treated by UV reactors operating within validated conditions for the required dose as specified in 141.720(d).
No later than the applicable treatment compliance date in §141.713.
Within 10 days following the month in which monitoring was conducted, beginning on the applicable treatment compliance date in §141.713.

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