Current through August 26, 2024
(1) REPORTING PERIODS. Unless a shorter
reporting period is specified in this chapter, the water supplier shall use a
laboratory that will report to the department the results of any test
measurement or analysis required by this chapter within one of the following
time periods, whichever is shortest:
(a) The
first 10 days following the month in which the analysis is completed.
(b) The first 10 days following the end of
the required monitoring period as stipulated by the department.
(2) VIOLATION REPORTING. Unless
another time period is specified in this chapter, the water supplier shall
report to the department, no later than 24 hours after receiving the test
results, the failure to comply with any maximum contaminant level, or
monitoring requirement, or treatment technique set forth in this
chapter.
(3) REPORTING
RESPONSIBILITY. The supplier of water is not required to report analytical
results to the department if the laboratory doing the analysis has reported the
results electronically to the department within the time frames contained in
this section. The water supplier is responsible for analytical results that are
not reported within the required time frames.
(4) ELECTRONIC REPORTING.
(a) When determining compliance with any
water quality monitoring, or drinking water maximum contaminant levels
specified in this chapter, the department shall accept analytical results only
from laboratories that report results directly to the department in a
department approved electronic format and are certified under ch. ATCP 77, ch.
NR 149 for safe drinking water analyses or laboratories approved by EPA for
radionuclide analyses.
(b) Results
of microbiological samples collected to satisfy requirements of subch. I shall
be reported to the department and the water supplier within 24 hours of the
time the results are obtained by the laboratory. When results are obtained on a
weekend or holiday, the results shall be provided to the water supplier and the
department as soon as practicable.
(c) Analytical results other than those under
par. (b) obtained to satisfy requirements of this chapter shall be reported as
required under subs. (1) and (2).
(d) The department may approve submission of
compliance data required under this chapter in alternate formats on a
case-by-case basis if the alternate format does not create a delay in
determining compliance with any requirement in this chapter or have the
potential for delaying response to a public health threat.
(5) PUBLIC NOTICE REPORTING. The water
supplier, within 10 days of completion of each public notification required
under subch. VII, shall submit to the department a certification that it has
fully complied with the public notification regulations. The water supplier
shall include with this certification a representative copy of each type of
notice distributed, published, posted, or made available to the persons served
by the public water system or to the media, or both.
(6) MONTHLY OPERATING REPORTS WITHOUT
FILTRATION. A water supplier for a public water system that uses a groundwater
source under the direct influence of surface water and does not provide
filtration treatment shall report monthly to the department the information
specified in this subsection.
(a) Source water
quality information shall be reported to the department within 10 days after
the end of each month the public water system serves water to the public.
Information that shall be reported includes:
1. The cumulative number of months for which
results are reported.
2. The number
of fecal or total coliform samples, whichever are analyzed during the month, or
if the water supplier monitors for both, only the number of fecal coliform
samples, the dates of sample collection, and the dates when the turbidity level
exceeded 1 NTU.
3. The number of
samples during the month 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.
4. The cumulative number
of fecal or total coliform samples, whichever are analyzed, during the previous
6 months the public water system served water to the public.
5. 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 public water system served water to the public.
6. The percentage 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
public water system served water to the public.
7. The maximum turbidity level measured
during the month, the dates of occurrence for any measurements which exceeded 5
NTU, and the dates the occurrences were reported to the department.
8. For the first 12 months of record keeping,
the dates and cumulative number of events during which the turbidity exceeded 5
NTU, and after one year of record keeping for turbidity measurements, the dates
and cumulative number of events during which the turbidity exceeded 5 NTU in
the previous 12 months the public water system served water to the
public.
9. For the first 120 months
of record keeping, the dates and cumulative number of events during which the
turbidity exceeded 5 NTU, and after 10 years of record keeping for turbidity
measurements, the dates and cumulative number of events during which the
turbidity exceeded 5 NTU in the previous 120 months the public water system
served water to the public.
(b) Disinfection information specified in s.
NR 810.38(1) shall be reported to the
department within 10 days after the end of each month the public water system
serves water to the public. Information that shall be reported includes:
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 concentrations (in mg/l) and disinfectant contact times
(in minutes) used for calculating the CT values.
4. If chlorine is used, the daily
measurements of pH of disinfected water following each point of chlorine
disinfection.
5. The daily
measurements of water temperature in ºC 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
lamblia cyst and virus inactivation, i.e., whether (CTcalc/
CT99.9) is at least 1.0, or where
disinfectants other than chlorine are used, other indicator conditions that the
department determines are appropriate, are met.
8. The following information on the samples
taken in the distribution system in conjunction with total coliform monitoring
pursuant to s.
NR 810.31:
a. Number of
instances where the residual disinfectant concentration is measured;
b. Number of instances where the residual
disinfectant concentration is not measured but heterotrophic bacteria plate
count (HPC) is measured;
c. Number
of instances where the residual disinfectant concentration is measured but not
detected and no HPC is measured;
d.
Number of instances where no residual disinfectant concentration is detected
and where HPC is > 500/ml;
e.
Number of instances where the residual disinfectant concentration is not
measured and HPC is > 500/ml;
f.
For the current and previous month the public water system serves water to the
public, the value of "V" in the following formula:
V = c + d + e/a + b x 100
where:
a = the value in this subd. 8. a.
b = the value in this subd. 8. b.
c = the value in this subd. 8. c.
d = the value in this subd. 8. d.
e = the value in this subd. 8. e.
g. If the department determines, based on
site specific considerations, that a water supplier has no means for having a
sample transported and analyzed for HPC by a certified laboratory within the
requisite time and temperature conditions specified by s.
NR 810.38
and that the public water system is providing adequate disinfection in the
distribution system, the requirements of this subd. 8. a. to f. do not apply.
9. A water supplier
need not report the data listed in subds. 1. and 3. to 6. if all data listed in
par. (b) remain on file at the public water system and department determines
that:
a. The water supplier has submitted to
the department all the information required by subds. 1. to 8. for at least 12
months; and
b. The department has
determined that the public water system is not required to provide filtration
treatment.
(c) No later than 10 days after September 30,
the end of each federal fiscal year, each water supplier shall provide to the
department a report which summarizes the public water system's compliance with
all wellhead protection program requirements specified in s.
NR 810.30(2) (b).
(d) No later than 10 days after September 30,
the end of each federal fiscal year, each water supplier shall provide to the
department a report of the on-site inspection conducted during that year
pursuant to s.
NR 810.32(2) (c), unless the on-site
inspection was conducted by the department. If the inspection was conducted by
the department, the department shall provide a copy of its report to the public
water system.
(e)
1. Each water supplier, upon discovering that
a waterborne disease outbreak potentially attributable to their public water
system has occurred, shall report that occurrence to the department as soon as
possible, but no later than by the end of the next business day.
2. If at any time the turbidity exceeds 5
NTU, the water supplier shall consult with the department as soon as possible,
but no later than 24 hours after the exceedance is known, in accordance with
the public notification requirements under s.
NR 809.952(2) (c).
3. If at any time the disinfectant residual
falls below 0.2 mg/l in the water entering the distribution system, the water
supplier shall notify the department as soon as possible, but no later than by
the end of the next business day. The water supplier also shall notify the
department by the end of the next business day whether or not the residual was
restored to at least 0.2 mg/l within 4 hours.
(7) MONTHLY OPERATING REPORTS WITH
FILTRATION. A water supplier for a public water system that uses a surface
water source or a groundwater source under the direct influence of surface
water and provides filtration treatment shall report monthly to the department
the information specified in this subsection.
(a) Turbidity measurements as required by s.
NR 810.38(2)
(a) shall be reported within 10 days after
the end of each month the public water system serves water to the public.
Information that shall be reported includes:
1. The total number of filtered water
turbidity measurements taken during the month and the highest daily turbidity
measurement for each day.
2. The
number and percentage of filtered water turbidity measurements taken during the
month which are less than or equal to the turbidity limits specified in s.
NR 810.29 for the filtration technology being
used.
3. The date and value of any
turbidity measurements taken during the month which exceed 1.0 NTU for public
water systems using conventional or direct filtration, or which exceed the
maximum level set in s.
NR 810.29.
(b) Disinfection information specified in s.
NR 810.38
shall be reported to the department within 10 days after the end of each month
the public water system serves water to the public. Information that shall be
reported includes:
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 following
information on the samples taken in the distribution system in conjunction with
total coliform monitoring pursuant to s.
NR 810.31:
a. Number of
instances where the residual disinfectant concentration is measured;
b. Number of instances where the residual
disinfectant concentration is not measured but heterotrophic bacteria plate
count (HPC) is measured;
c. Number
of instances where the residual disinfectant concentration is measured but not
detected and no HPC is measured;
d.
Number of instances where no residual disinfectant concentration is detected
and where HPC is > 500/ml;
e.
Number of instances where the residual disinfectant concentration is not
measured and HPC is > 500/ml;
f.
For the current and previous month the public water system serves water to the
public, the value of "V" in the following formula:
V = c + d + e/a + b x 100
where:
a = the value in this subd. 3. a.
b = the value in this subd. 3. b.
c = the value in this subd. 3. c.
d = the value in this subd. 3. d.
e = the value in this subd. 3. e.
g. If the department determines, based on
site specific considerations, that a water supplier has no means for having a
sample transported and analyzed for HPC by a certified laboratory within the
requisite time and temperature conditions specified by s.
NR 810.38
and that the public water system is providing adequate disinfection in the
distribution system, the requirements of this subd. 3. a. to f. do not apply.
4. A water supplier
need not report the data listed in subd. 1. if all data listed in this
paragraph remains on file at the public water system and the department
determines that the water supplier has submitted all the information required
by this paragraph for at least 12 months.
(c)
1. If
during any 4 hour monitoring period the turbidity exceeds 0.3 NTU or at any
time during the month, turbidity measurements indicate the 95th percentile
turbidity level of 0.5 NTU will be exceeded for that month, the water supplier
shall inform the department as soon as possible, but no later than the end of
the next business day.
2. If at any
time the disinfectant residual falls below 0.2 mg/l in the water entering the
distribution system, the water supplier shall notify the department as soon as
possible, but no later than the end of the next business day. The water
supplier also shall notify the department by the end of the next business day
whether or not the residual was restored to at least 0.2 mg/l within 4
hours.
(8)
RECORDS RETENTION AND REPORTING. Public water systems shall maintain the
results of individual filter monitoring taken under s.
NR 810.38(2) for at least 3 years. Water
suppliers shall report that they have conducted individual filter turbidity
monitoring under s.
NR 810.38(2)
(b) within 10 days after the end of each
month the public water system serves water to the public. Water suppliers shall
report individual filter turbidity measurement results taken under s.
NR 810.38(2) within 10 days after the
end of each month the public water system serves water to the public only if
measurements demonstrate one or more of the conditions in pars. (a) to (d).
Water suppliers for public water systems that use lime softening may apply to
the department for alternative exceedance levels for the levels specified in
pars. (a) to (d) if they can demonstrate that higher turbidity levels in
individual filters are due to lime carryover only and not due to degraded
filter performance.
(a) For any individual
filter that has a measured turbidity level of greater than 1.0 NTU in 2
consecutive measurements taken 15 minutes apart, the water supplier shall
report the filter number, the turbidity measurement, and the dates on which the
exceedance occurred. In addition, the water supplier shall either produce a
filter profile for the filter within 7 days of the exceedance, if the water
supplier is no Table to identify an obvious reason for the abnormal filter
performance, and report that the profile has been produced or report the
obvious reason for the exceedance.
(b) For any individual filter that has a
measured turbidity level of greater than 0.5 NTU in 2 consecutive measurements
taken 15 minutes apart at the end of the first 4 hours of continuous filter
operation after the filter has been backwashed or otherwise taken offline, the
water supplier shall report the filter number, the turbidity, and the dates on
which the exceedance occurred. In addition, the water supplier shall either
produce a filter profile for the filter within 7 days of the exceedance, if the
water supplier no Table to identify an obvious reason for the abnormal filter
performance, and report that the profile has been produced or report the
obvious reason for the exceedance.
(c) For any individual filter that has a
measured turbidity level of greater than 1.0 NTU in 2 consecutive measurements
taken 15 minutes apart at any time in each of 3 consecutive months, the water
supplier shall report the filter number, the turbidity measurement, and the
dates on which the exceedance occurred. In addition, the water supplier shall
conduct a self-assessment of the filter within 14 days of the exceedance and
report that the self-assessment was conducted. The self-assessment shall
consist of at least the following components: assessment of filter performance;
development of a filter profile; identification and prioritization of factors
limiting filter performance; assessment of the applicability of corrections;
and preparation of a filter self-assessment report.
(d) For any individual filter that has a
measured turbidity level of greater than 2.0 NTU in 2 consecutive measurements
taken 15 minutes apart at any time in each of 2 consecutive months, the water
supplier shall report the filter number, the turbidity measurement, and the
dates on which the exceedance occurred. In addition, the water supplier shall
arrange for the conduct of a comprehensive performance evaluation by the
department or a third party approved by the department no later than 30 days
following the exceedance and have the evaluation completed and submitted to the
department no later than 90 days following the exceedance.
(e) The following turbidity exceedances shall
be reported as follows:
1. If at any time the
turbidity exceeds 1 NTU on representative samples of filtered water in a public
water system using conventional filtration treatment or direct filtration, the
water supplier system shall inform the department as soon as possible, but no
later than the end of the next business day.
2. If at any time the turbidity in
representative samples of filtered water exceeds the maximum level set by the
department under s.
NR 810.29(5) for filtration technologies
other than conventional filtration treatment, direct filtration, slow sand
filtration or diatomaceous earth filtration, the water supplier shall inform
the department as soon as possible, but no later than the end of the next
business day.
(9) WATERBORNE DISEASE REPORTING. Each water
supplier, upon discovering that a waterborne disease outbreak potentially
attributable to the water supplier's public water system has occurred, shall
report that occurrence to the department as soon as possible, but no later than
by the end of the next business day.
(9m) SEASONAL SYSTEM START-UP PROCEDURE
REPORTING. Before serving water to the public, the water supplier for a
seasonal public water system must certify to the department that it has
complied with the department-approved start-up procedure.
(10) ADDITIONAL RECORD REPORTING. Upon the
request of the department, the water supplier shall submit to the department
copies of any records required to be maintained under s.
NR 809.82 or
copies of any documents then in existence which the department is entitled to
inspect under the authority of s.
281.97,
Stats.
(11) REPORTING FORMAT. The
department may specify the format for reporting analytical results required
under this chapter.
