This rule applies to all surface water systems and consecutive
water systems receiving water from a surface water source. Seasonal systems
shall monitor in accordance with this rule during the system's operating
season.
(A) Surface water systems.
(1) Cyanobacteria screening.
Surface water systems shall monitor with a minimum of one
sample from each raw water sampling point
at least once every two weeks for cyanobacteria screening
during harmful algal bloom season
.
Cyanobacteria samples shall be collected at the same
time as the routine microcystins sample.
(2) Routine
microcystins monitoring.
(a)
Routine
microcystins monitoring requirements between May first and October
thirty-first.
Requirements during harmful algal
bloom season (June through November).
Surface
(i)
Surface
water systems shall monitor
for microcystins
analysis with a minimum of one sample from each
raw water sampling point
and one sample from each finished water sampling
point at least weekly for microcystins analysis
once every two weeks and on the alternate week of
cyanobacteria screening sample.
(b) Routine microcystins monitoring
requirements between November first and April thirtieth.
(i) Surface water systems shall
continue to monitor in accordance with paragraph (A)(2)(a) of this rule unless
microcystins are not detected in at least two consecutive weekly samples from
both the raw water sampling point and the finished water sampling point, then
the microcystins monitoring frequency is reduced to a minimum of one sample
from each raw water sampling point at least once every two
weeks.
(ii) If
microcystins are
detected at a
raw water sampling point,
weekly monitoring at
that
raw water sampling point and the
finished water sampling point shall be
conducted beginning no later than twenty-four hours following the
detection.
When
microcystins are not
detected in at least two consecutive
weekly samples
from both the
raw water sampling point and the
finished water sampling point,
then monitoring once every two weeks may resume in accordance with paragraph
(A)(2)(b)(i)
(A)(2)(a)(i) of this rule.
(iii)
If
cyanobacteria screening results indicate microcystin production genes greater
than five gene copies per microliter and concurrent weekly data for
microcystins are not available for raw or finished water samples, the water
system must collect a sample at the finished water sampling point within
twenty-four hours of notification of the detection for microcystins analysis.
If microcystins are not detected in raw and/or finished water samples, then
monitoring once every two weeks may resume in accordance with paragraph
(A)(2)(a)(i) of this rule.
(c) Increased routine microcystin
monitoring (three days per week).
The frequency of monitoring at both
raw water sampling points and finished water sampling points shall be increased
to three days a week, beginning no later than the following week, if
microcystins exceed five micrograms per liter (ug/L) at the raw water sampling
point, unless an alternate frequency has been established as part of the
approved cyanotoxin general plan in accordance with rule
3745-90-05
of the Administrative Code.
Routine monitoring in accordance
with paragraphs (A)(2)(a) and (A)(2) (b) of this rule may resume once the
following occur:
(i) Microcystins concentrations are
equal to or less than five ug/L in two consecutive samples from the raw water
sampling point that are collected at least one day apart.
(ii) Microcystins concentration is
non-detect at finished water sampling points.
(iii) If samples were collected at
distribution sampling points in accordance with this rule, microcystins are not
detected at any distribution sampling point.
(d)(b)
Increased routine microcystins monitoring
(daily).
Requirements during off-season
(December through May).
Surface water systems shall monitor
with a minimum of one sample from each finished water sampling point at least
once every two weeks for microcystins analysis.
The frequency of monitoring at both
raw water sampling points and finished water sampling points shall be increased
to daily if microcystins are detected at finished water sampling points
collected in accordance with this rule, or distribution sampling points
collected in accordance with this rule. Daily monitoring shall include analysis
within twenty-four hours of sample collection.
Routine monitoring may resume in
accordance with paragraphs (A)(2)(a) and (A)(2)(b) of this rule if the two most
recent consecutive daily samples from the raw water sampling point are equal to
or less than five ug/L, or in accordance with paragraph (A)(2)(c) of this rule
if either of the two most recent consecutive daily samples from the raw water
sampling point are greater than five ug/L, once the following
occur:
(i) Microcystins are not detected in
two consecutive daily samples collected at the finished water sampling
point.
(ii) If samples were collected at
distribution sampling points in accordance with this rule, microcystins are
below the action level at distribution sampling points.
(3) Revised
cyanobacteria screening or routine
microcystins monitoring
frequency.
The required cyanobacteria
screening or routine microcystins monitoring frequency may be revised (decreased, increased or
discontinued) at the discretion of the director. When establishing the revised
schedule, the director may consider cyanobacteria screening data collected in
accordance with this rule, microcystins data, and other information provided by
the public water system including data from other screening tools (such as
phycocyanin sensors or phytoplankton enumeration) and treatment information.
Surface water systems shall monitor in accordance with the revised
cyanobacteria screening or routine
microcystins monitoring schedule established by the director.
(4) Response to
microcystins action level
exceedance.
If microcystins exceed an action level established in paragraph
(A)(1) or (A) (2) of rule
3745-90-02
of the Administrative Code in routine samples collected at the finished water
sampling point, the public water system shall do the following:
(a) As soon as possible, but no later than
twenty-four hours after receiving the results of the initial
action level
exceedance, collect one
resample from each
raw water sampling point and one
resample from each
finished water sampling point. Analysis of resamples must be
completed within twenty-four hours of collection. These resamples satisfy the
requirement for
daily
increased microcystins monitoring samples as set forth
in paragraph
(A) (2)(d)
(A)(4)(d) of this rule.
(b) Within twenty-four hours of collecting
the resamples, collect one
repeat sample from each
raw water sampling point and
one
repeat sample from each
finished water sampling point. Analysis of repeat
samples must be completed within twenty-four hours of collection. These repeat
samples satisfy the requirement for
daily
increased monitoring samples as set forth in
paragraph
(A)(2)(d)
(A)(4)(d) of this rule.
(c) If the
microcystins concentration exceeds
the
action level in the
resample or
repeat sample collected at any
finished
water sampling point in accordance with paragraph (A)(4)(a) or (A)(4)(b) of
this rule, as soon as practical but no later than three hours after receiving
the
resample or
repeat sample results, the surface water system shall notify
all consecutive systems served by the water system.
The surface
If a water
system
with the action level exceedance, and all
consecutive water systems served by the water system, shall within twenty-four
hours of receiving the resample or repeat sample results, collect
collects samples at representative
distribution
sampling points in accordance with
procedures developed
as part of the contingency plan required by rule
3745-85-01 of
the Administrative Code
. Additional distribution
system monitoring may be required by
,
the director
based on sampling results and other
relevant circumstances. Analysis of distribution samples must be completed
within twenty-four hours of collection
may
allow the system to limit distribution of the public notice in accordance with
rule
3745-85-01 of
the Administrative Code.
Distribution system
monitoring may be required by the director based on sampling results and other
relevant circumstances.
(d)
Conduct
routine daily
increased mycrocystins monitoring
of three times per week
in accordance with paragraph (A)(2)(d) of this
rule.
The frequency of microcystins
monitoring shall be one day per week at raw water sampling points and increased
to three days per week at finished water sampling points. Increased monitoring
(three days per week) shall include analysis within twenty-four hours of sample
collection. The resample and repeat samples collected in accordance with
paragraphs (A)(4)(a) and (A)(4)(b) of this rule satisfy the requirement for
increased monitoring.
Routine microcystins monitoring may
resume in accordance with paragraphs (A)(2)(a) and (A)(2)(b) of this rule, once
microcystins are not detected in finished water in two consecutive samples
collected on separate calendar days.
(e)
Conduct public
notification in accordance with rule
3745-90-06
of the Administrative Code.
(B) Consecutive water systems receiving water
from an in-state surface water system.
Within twenty-four hours of
receiving notification of an action level exceedance in accordance with
paragraph (A)(4)(c) or (C)(2)(c) of this rule, the consecutive water system
shall collect samples at representative distribution sampling points in
accordance with the contingency plan required by rule
3745-85-01 of
the Administrative Code. Additional distribution system monitoring may be
required by the director based on sampling results and other relevant
circumstances. Analysis of distribution samples must be completed within
twenty-four hours of collection.
In accordance with paragraph (A)(4)(c)
of this rule consecutive water systems served by instate surface water systems
shall be notified by the parent system if microcystins concentration exceeds
the action level in resample or repeat samples collected at any finished water
sampling point. If a water system collects samples at representative
distribution sampling points in accordance with procedures developed as part of
the contingency plan required by rule
3745-85-01 of
the Administrative Code, the director may allow the system to limit
distribution of the public notice in accordance with rule
3745-81-32 of
the Administrative Code. Distribution system monitoring may be required by the
director based on sampling results and other relevant circumstances. Water
systems shall conduct public notification in accordance with rule 3745-90-06 of
the Administrative Code.
(C) Consecutive water systems receiving water
from an out-of-state surface water source.
(1) Routine
microcystins monitoring.
(a)
Routine
microcystins monitoring requirements between May first and October
thirty-first.
Requirements during harmful algal
bloom season (June through November).
Consecutive water systems receiving water from an out-of-state
surface water source shall monitor with a minimum of one sample from each
finished water sampling point at least weekly for microcystins analysis.
(b)
Routine microcystins monitoring requirements between
November first and April thirtieth.
Requirements during off-season (December through May).
Consecutive water systems receiving water from an out-of-state
surface water source shall monitor with a minimum of one sample from each
finished water sampling point at least once every two weeks for microcystins
analysis.
(c) Increased routine microcystins
monitoring (daily).
The frequency of monitoring at
finished water sampling points shall be increased to daily if microcystins are
detected at finished water sampling points collected in accordance with this
rule, or distribution sampling points collected in accordance with this rule.
Daily monitoring shall include analysis within twenty-four hours of sample
collection.
Routine monitoring may resume in
accordance with paragraph (C)(1)(a) or (C)(1)(b) of this rule once the
following occur:
(i) Microcystins are not detected in
two consecutive daily samples collected at the finished water sampling
point.
(ii) If samples were collected at
distribution sampling points in accordance with this rule, microcystins are
below the action level at distribution sampling points.
(d)(c) Revised routine
microcystins monitoring
frequency.
The routine
required microcystins monitoring
frequency may be revised (decreased,
increased or discontinued) at the discretion of the director. When establishing
the revised schedule, the director may consider microcystins data, and other
information provided by the public water system including data from screening
tools (such as phycocyanin sensors or phytoplankton enumeration) and treatment
information. Consecutive water systems shall monitor in accordance with the
revised routine microcystins monitoring schedule established by the
director.
(2)
Response to
microcystins action level exceedance.
If microcystins exceed an action level established in paragraph
(A)(1) or (A) (2) of rule
3745-90-02
of the Administrative Code in routine samples collected at the finished water
sampling point, the public water system shall do the following:
(a) As soon as possible, but no later than
twenty-four hours after receiving the results of the initial
action level
exceedance, collect one
resample from each
finished water sampling point.
Analysis of resamples must be completed within twenty-four hours of collection.
This
resample satisfies the requirement for
daily
increased
microcystins monitoring samples as set forth in paragraph
(C)(1)(c)
(C)(2)(d) of this rule.
(b) Within twenty-four hours of collecting
the resamples, collect one
repeat sample from each
finished water sampling
point. Analysis of repeat samples must be completed within twenty-four hours of
collection. This
repeat sample satisfies the requirement for
daily
increased
microcystins samples as set forth in paragraph
(C)(1)(c)
(C)(2)(d) of
this rule.
(c) If the
microcystins
concentration exceeds the
action level in the
resample or
repeat sample
collected at any
finished water sampling point in accordance with paragraph
(C)(2)(a) or (C)(2)(b) of this rule, as soon as practical but no later than
three hours after receiving the
resample or
repeat sample results, the public
water system shall notify all consecutive systems served by the water system.
The public
If
a water system
with the action level
exceedance, and all consecutive water systems served by the water system, shall
within twenty-four hours of receiving the resample or repeat sample results,
collect
collects samples at
representative
distribution sampling points in accordance with
procedures developed as part of the contingency
plan required by rule
3745-85-01 of
the Administrative Code
,
. Additional
the director
may allow the system to limit distribution
of the
public notice in accordance with rule
3745-81-32 of
the Administrative Code. Distribution system monitoring may be required
by the director based on sampling results and other relevant circumstances.
Analysis of distribution samples must be completed
within twenty-four hours of collection.
(d) Conduct
routine daily
increased
microcystins
monitoring
of three days per
week
in accordance with paragraph (C)(1)(c) of
this rule.
The frequency of microcystins
monitoring at finished water sampling points shall be increased to three times
per week. Increased monitoring shall include analysis within twenty-four hours
of sample collection. The resample and repeat samples collected in accordance
with paragraphs (C)(2)(a) and (C)(2)(b) of this rule satisfy the requirement
for increased monitoring.
Routine microcystins monitoring may
resume in accordance with paragraph (C)(1)(a) or (C)(1)(b) of this rule once
microcystins are not detected in two consecutive samples collected on separate
calendar days at the finished water sampling point.
(e)
Conduct public
notification in accordance with rule
3745-90-06
of the Administrative Code.
(D) Monitoring extension.
Upon a request from a public water system, the director may
agree to extend the twenty-four hour monitoring requirement for
daily
increased, resample, repeat or distribution samples
required pursuant to this rule on a case-by-case basis when the public water
system has a logistical problem collecting samples within twenty-four hours or
analyzing samples in accordance with the requirements of this chapter. When an
extension is agreed to by the director, the director shall specify in writing
how much time the public water system has to monitor. Examples of potential
logistical problems include, but are not limited to:
(1) Extreme weather conditions create unsafe
travel or on-site conditions for the person collecting the sample.
(2) Limited certified laboratory capacity on
weekends and holidays.
(E) Violations.
Failure to comply with routine and
distribution monitoring requirements in paragraph (A)(1), (A)(2),
(A)(3), or (A)(4)(d)
(A)(4)(c), (B), (C)(1), or
(C)(2)(d)
or (C)(2)(c) of this rule
is a monitoring violation and requires the public water system to provide
Tier
tier 3
public notification in accordance with rule
3745-81-32 of
the Administrative Code. Failure to comply with resample and repeat sample
requirements in paragraph (A)(4)(a), (A)(4)(b), (C)(2)(a) or (C)(2)(b) of this
rule is a monitoring violation and requires the public water system to provide
a tier 1 public notification accordance with rule
3745-81-32 of
the Administrative Code.
Notes
Ohio Admin. Code 3745-90-03
Effective:
11/1/2022
Five Year Review (FYR) Dates:
3/30/2022 and
11/01/2027
Promulgated
Under:
119.03
Statutory Authority:
3745.50,
6109.04
Rule Amplifies:
3745.50,
6109.04
Prior Effective Dates:
06/01/2016
