N.H. Admin. Code § Env-Ws 380.20

Current through Register No. 50, December 12, 2024

Section Env-Ws 380.20 - Reporting and Recordkeeping Requirements for Systems Not Using Filtration

Reporting and recordkeeping requirements for system owners that do not provide filtration shall be as follows:

(a) A public water system owner that uses a surface water source and does not provide filtration treatment shall report monthly to the departmentthe information specified below.

(b) A public water system owner that uses a ground water source under the direct influence of surface water and does not provide filtration treatment shall report monthly to the department the information specified belowbeginning 6 months after the department determines that the ground water source is under the direct influence of surface water;

(c) Source water quality information shall be reported to the department within 10 days after the end of each month that the system serves water to the public as follows:

(1) The cumulative number of months for which results are reported;

(2) The number of fecal and total coliform samples, or both, whichever are analyzed during the month, the dates of sample collection, and the dates when the turbidity level exceeded 1 NTU;

(3) If a system owner monitors for both fecal coliforms and total coliforms, only fecal coliforms shall be reported;

(4) The number of samples during the month that had equal to or less than 20/100 ml fecal coliforms and equal to or less than 100/100 ml total coliforms, whichever are analyzed;

(5) The cumulative number of fecal or total coliform samples, whichever are analyzed, during the previous 6 months the system served water to the public;

(6) The cumulative number of samples that had equal to or less than 20/100 ml fecal coliforms or equal to or less than 100/100 ml total coliforms, whichever are analyzed, during the previous 6 months the system served water to the public;

(7) The percentage of samples that had equal to or less than 20/100 ml fecal coliforms or equal to or less than l00/l00 ml total coliforms, whichever are analyzed, during the previous 6 months the system served water to the public;

(8) The maximum turbidity level measured during the month, the date(s) of occurrence for any measurement(s) which exceeded 5 NTU, and the date(s) the occurrence(s) was reported to the department;

(9) For the first 12 months of recordkeeping, the dates and cumulative number of events during which the turbidity exceeded 5 NTU, and after one year of recordkeeping for turbidity measurements, the dates and cumulative number of events during which the turbidity exceeded 5 NTU in the previous 12 months the system served water to the public; and

(10) For the first 120 months of recordkeeping, the dates and cumulative number of events during which the turbidity exceeded 5 NTU, and after 10 years of recordkeeping for turbidity measurements, the dates and cumulative number of events during which the turbidity exceeded 5 NTU in the previous 120 months the system served water to the public;

(d) Disinfection information specified in Env-Ws 380.14 shall be reported to the department within 10 days after the end of each month the system serves water to the public as follows:

(1)For each day, the lowest measurement of residual disinfectant concentration in mg/l in water entering the distribution system;

(2) The date and duration of each period when the residual disinfectant concentration in water entering the distribution system fell below 0.2 mg/l and when the department was notified of the occurrence;

(3) The daily residual disinfectant concentration(s), in mg/l, and disinfectant contact time(s), in minutes, used for calculating the CT value(s);

(4) If chlorine is used, the daily measurement(s) of pH of disinfected water following each point of chlorine disinfection;

(5) The daily measurement(s) of water temperature in C following each point of disinfection;

(6) The daily Ctcalc and Ctcalc/CT99.9 values for each disinfectant measurement or sequence and the sum of all Ctcalc/CT99.9 values, [SIGMA] (Ctcalc/CT99.9), before or at the first customer;

(7) The daily determination of whether disinfection achieves adequate giardia cyst and virus inactivation, where disinfectants other than chlorine are used, other indicator conditions are met;

(8) The following information on the samples taken in the distribution system in conjunction with total coliform monitoring pursuant to Env-Ws 325:

a. The number of instances where the residual disinfectant concentration is measured;

b. The number of instances where the residual disinfectant concentration is not measured but heterotrophic bacteria plate count is measured;

c. The number of instances where the residual disinfectant concentration is measured but not detected and no HPC is measured;

d. The number of instances where no residual disinfectant concentration is detected and where HPC is >500/ml;

e. The number of instances where the residual disinfectant concentration is not measured and HPC is >500/ml; and

f. For the current and previous month the system served water to the public, the value of "V" calculated in Env-Ws 380.10; and

(9) A system owner need not continue to report the data listed in (d)(1) through (6) above if all data listed in paragraphs (d)(1) through (8) above remain on file at the system, and the department determines that:

a. The system owner has submitted to the department all the information required by (d)(1) through (8) of this section for at least 12 months; and

b. The system owner is not required to provide filtration treatment;

(e) No later than 10 days after the end of each calendar year, each system owner shall provide to the department a report which summarizes its compliance with all watershed control program requirements specified in Env-Ws 380.07;

(f) No later than 10 days after the end of each calendar year, the department shall provide a copy of its report on the on-site inspection conducted during that year pursuant to Env-Ws 380.07 to the public water system owner;

(g) Each system owner, upon discovering that a waterborne disease outbreak potentially attributable to that water system has occurred, shall report that occurrence to the departmentas soon as possible, but no later than by the end of the next business day after such discovery;

(h) If at any time the turbidity exceeds 5 NTU, the system owner shall inform the department as soon as possible, but no later than the end of the next business day after such discovery; and

(i) If at any time the residual falls below 0.2 mg/l in the water entering the distribution system, the system owner shall notify the department:

(1) A s soon as possible, but no later than by the end of the next business day after such discovery; and

(2) By the end of the next business daywhether the residual was restored to at least 0.2 mg/l within 4 hours.

N.H. Admin. Code § Env-Ws 380.20

#5098, eff 3-18-91, EXPIRED 3-18-97

New. #6521, eff 6-4-97 (See Revision Note at chapter heading for Env-Ws 300); amd by #7754, eff 8-21-02; ss by #8352, eff 5-14-05 (formerly part of Env-Ws 380.25 )