Current through Register Vol. 63, No. 3, March 1, 2024
(1) Any person having control over the
treatment or distribution or both of recycled water may distribute recycled
water only for the beneficial purposes described in this rule, and must take
all reasonable steps to ensure that the recycled water is used only in
accordance with the standards and requirements of the rules of this
division.
(2) Any person who uses
recycled water may use recycled water only for the beneficial purposes
described in this rule, and must comply with the standards and requirements of
this rule and the rules of this division.
(3) The following requirements apply to
nondisinfected recycled water.
(a) Beneficial
Purposes. Nondisinfected recycled water may be used only for the following
beneficial purposes and only if the rules of this division are met:
(A) Irrigation for growing fodder, fiber,
seed crops not intended for human ingestion, or commercial timber;
and
(B) Any beneficial purpose
authorized in writing by the department pursuant to OAR
340-055-0016(6).
(b) Treatment. Nondisinfected
recycled water must be an oxidized wastewater.
(c) Criteria. There are no disinfection
criteria for nondisinfected recycled water.
(d) Monitoring. Monitoring must be in
accordance with the wastewater treatment system owner's NPDES or WPCF
permit.
(e) Setback Distances.
There must be a minimum of 150 feet from the edge of the irrigation site to a
water supply source used for human consumption. Other site specific setback
distances for irrigation necessary to protect public health and the environment
must be established in the recycled water use plan and must be met when
irrigating.
(f) Access and
Exposure. Public access to the irrigation site must be prevented.
(g) Site Management.
(A) Irrigation with recycled water is
prohibited for 30 days before harvesting.
(B) Sprinkler irrigation is prohibited unless
authorized in advance and in writing by the department based on demonstration
that public health and the environment will be adequately protected from
aerosols.
(4)
The following requirements apply to Class D recycled water.
(a) Beneficial Purposes. Class D recycled
water may be used only for the following beneficial purposes and only if the
rules of this division are met:
(A) Any
beneficial purpose defined in subsection (3)(a) of this rule;
(B) Irrigation of firewood, ornamental
nursery stock, Christmas trees, sod, or pasture for animals; and
(C) Any beneficial purpose authorized in
writing by the department pursuant to OAR
340-055-0016(6).
(b) Treatment. Class D recycled
water must be an oxidized and disinfected wastewater that meets the numeric
criteria in subsection (c) of this section.
(c) Criteria. Class D recycled water must not
exceed a 30-day log mean of 126 E. coli organisms per 100 milliliters and 406
E. coli organisms per 100 milliliters in any single sample.
(d) Monitoring. Monitoring for E. coli
organisms must occur once per week at a minimum.
(e) Setback Distances.
(A) Where an irrigation method is used to
apply recycled water directly to the soil, there must be a minimum of 10 feet
from the edge of the site used for irrigation and the site property
line.
(B) Where sprinkler
irrigation is used, there must be a minimum of 100 feet from the edge of the
site used for irrigation and the site property line.
(C) There must be a minimum of 100 feet from
the edge of an irrigation site to a water supply source used for human
consumption.
(D) Where sprinkler
irrigation is used, recycled water must not be sprayed within 70 feet of an
area where food is prepared or served, or where a drinking fountain is
located.
(f) Access and
Exposure.
(A) Animals used for production of
milk must be restricted from direct contact with the recycled water.
(B) When using recycled water for irrigation
of sod, ornamental nursery stock, or Christmas trees, the personnel at the use
area must be notified that the water used is recycled water and is not safe for
drinking. The recycled water use plan must specify how notification will be
provided.
(g) Site
Management.
(A) When irrigating, signs must
be posted around the perimeter of the irrigation site stating recycled water is
used and is not safe for drinking.
(B) Irrigation of fodder, fiber, seed crops
not intended for human ingestion, sod, commercial timber, firewood, ornamental
nursery stock, or Christmas trees is prohibited for three days before
harvesting.
(5) The following requirements apply to Class
C recycled water.
(a) Beneficial Purposes.
Class C recycled water may be used only for the following beneficial purposes
and only if the rules of this division are met:
(A) Any beneficial purpose defined in
subsection (4)(a) of this rule;
(B)
Irrigation of processed food crops;
(C) Irrigation of orchards or vineyards if an
irrigation method is used to apply recycled water directly to the
soil;
(D) Landscape irrigation of
golf courses, cemeteries, highway medians, or industrial or business
campuses;
(E) Industrial,
commercial, or construction uses limited to: industrial cooling, rock crushing,
aggregate washing, mixing concrete, dust control, nonstructural fire fighting
using aircraft, street sweeping, or sanitary sewer flushing;
(F) Water supply source for landscape
impoundments; and
(G) Any
beneficial purpose authorized in writing by the department pursuant to OAR
340-055-0016(6).
(b) Treatment. Class C recycled
water must be an oxidized and disinfected wastewater that meets the numeric
criteria in subsection (c) of this section.
(c) Criteria. Class C recycled water must not
exceed a median of 23 total coliform organisms per 100 milliliters, based on
results of the last seven days that analyses have been completed, and 240 total
coliform organisms per 100 milliliters in any two consecutive
samples.
(d) Monitoring. Monitoring
for total coliform organisms must occur once per week at a minimum.
(e) Setback Distances.
(A) Where an irrigation method is used to
apply recycled water directly to the soil, there must be a minimum of 10 feet
from the edge of the site used for irrigation and the site property
line.
(B) Where sprinkler
irrigation is used, there must be a minimum of 70 feet from the edge of the
site used for irrigation and the site property line.
(C) There must be a minimum of 100 feet from
the edge of an irrigation site to a water supply source used for human
consumption.
(D) Where sprinkler
irrigation is used, recycled water must not be sprayed within 70 feet of an
area where food is being prepared or served, or where a drinking fountain is
located.
(f) Access and
Exposure.
(A) When irrigating for a
beneficial purpose defined in subsection (4)(a) of this rule, the access and
exposure requirements defined in subsection (4)(f) of this rule must be
met.
(B) During irrigation of a
golf course, a cemetery, a highway median, or an industrial or business campus,
the public must be restricted from direct contact with the recycled
water.
(C) If aerosols are
generated when using recycled water for an industrial, commercial, or
construction purpose, the aerosols must not create a public health
hazard.
(D) When using recycled
water for an agricultural or horticultural purpose where sprinkler irrigation
is used, or an industrial, commercial, or construction purpose, the public and
personnel at the use area must be notified that the water used is recycled
water and is not safe for drinking. The recycled water use plan must specify
how notification will be provided.
(g) Site Management.
(A) When irrigating for a beneficial purpose
defined in subsection (4)(a) of this rule, the site management requirements
defined in subsection (4)(g) of this rule must be met.
(B) When using recycled water for a landscape
impoundment or for irrigating a golf course, cemetery, highway median, or
industrial or business campus, signs must be posted at the use area and be
visible to the public. The signs must state that recycled water is used and is
not safe for drinking.
(C)
Irrigation of processed food crops is prohibited for three days before
harvesting.
(D) When irrigating an
orchard or vineyard, the edible portion of the crop must not contact the
ground, and fruit or nuts may not be harvested off the ground.
(E) When using recycled water for a landscape
impoundment, aerators or decorative fixtures that may generate aerosols are
allowed only if authorized in writing by the department.
(6) The following requirements
apply to Class B recycled water.
(a)
Beneficial Purposes. Class B recycled water may be used only for the following
beneficial purposes and only if the rules of this division are met:
(A) Any beneficial purpose defined in
subsection (5)(a) of this rule;
(B)
Stand-alone fire suppression systems in commercial and residential buildings,
non-residential toilet or urinal flushing, or floor drain trap
priming;
(C) Water supply source
for restricted recreational impoundments; and
(D) Any beneficial purpose authorized in
writing by the department pursuant to OAR
340-055-0016(6).
(b) Treatment. Class B recycled
water must be an oxidized and disinfected wastewater that meets the numeric
criteria in subsection (c) of this section.
(c) Criteria. Class B recycled water must not
exceed a median of 2.2 total coliform organisms per 100 milliliters, based on
results of the last seven days that analyses have been completed, and 23 total
coliform organisms per 100 milliliters in any single sample.
(d) Monitoring. Monitoring for total coliform
organisms must occur three times per week at a minimum.
(e) Setback Distances.
(A) Where an irrigation method is used to
apply recycled water directly to the soil, there are no setback
requirements.
(B) Where sprinkler
irrigation is used, there must be a minimum of 10 feet from the edge of the
site used for irrigation and the site property line.
(C) There must be a minimum of 50 feet from
the edge of the irrigation site to a water supply source used for human
consumption.
(D) Where sprinkler
irrigation is used, recycled water must not be sprayed within 10 feet of an
area where food is being prepared or served, or where a drinking fountain is
located.
(f) Access and
Exposure.
(A) During irrigation of a golf
course, the public must be restricted from direct contact with the recycled
water.
(B) If aerosols are
generated when using recycled water for an industrial, commercial, or
construction purpose, the aerosols must not create a public health
hazard.
(C) When using recycled
water for an agricultural or horticultural purpose where sprinkler irrigation
is used, or an industrial, commercial, or construction purpose, the public and
personnel at the use area must be notified that the water used is recycled
water and is not safe for drinking. The recycled water use plan must specify
how notification will be provided.
(g) Site Management.
(A) When irrigating for a beneficial purpose
defined in subsection (4)(a) of this rule, the site management requirements
defined in subsection (4)(g) of this rule must be met.
(B) When using recycled water for a landscape
impoundment or for irrigating a golf course, cemetery, highway median, or
industrial or business campus, signs must be posted at the use area and be
visible to the public. The signs must state recycled water is used and is not
safe for drinking.
(C) Irrigation
of processed food crops is prohibited for three days before
harvesting.
(D) When irrigating an
orchard or vineyard, the edible portion of the crop must not contact the
ground, and fruit or nuts may not be harvested off the ground.
(7) The following
requirements apply to Class A recycled water.
(a) Beneficial Purposes. Class A recycled
water may be used only for the following beneficial purposes and only if the
rules of this division are met:
(A) Any
beneficial purpose defined in subsection (6)(a) of this rule;
(B) Irrigation for any agricultural or
horticultural use;
(C) Landscape
irrigation of parks, playgrounds, school yards, residential landscapes, or
other landscapes accessible to the public;
(D) Commercial car washing or fountains when
the water is not intended for human consumption;
(E) Water supply source for nonrestricted
recreational impoundments;
(F)
Artificial groundwater recharge by surface infiltration methods or by
subsurface injection in accordance with OAR chapter 340, division 44. Direct
injection into an underground source of drinking water is prohibited unless
allowed by OAR chapter 340, division 44; and
(G) Any beneficial purpose authorized in
writing by the department pursuant to OAR
340-055-0016(6).
(b) Treatment. Class A recycled
water must be an oxidized, filtered and disinfected wastewater that meets the
numeric criteria in subsection (c) of this section are met.
(c) Criteria. Class A recycled water must not
exceed the following criteria:
(A) Before
disinfection, unless otherwise approved in writing by the department, the
wastewater must be treated with a filtration process, and the turbidity must
not exceed an average of 2 nephelometric turbidity units (NTU) within a 24-hour
period, 5 NTU more than five percent of the time within a 24-hour period, and
10 NTU at any time, and
(B) After
disinfection, Class A recycled water must not exceed a median of 2.2 total
coliform organisms per 100 milliliters, based on results of the last seven days
that analyses have been completed, and 23 total coliform organisms per 100
milliliters in any single sample.
(d) Monitoring.
(A) Monitoring for total coliform organisms
must occur once per day at a minimum.
(B) Monitoring for turbidity must occur on an
hourly basis at a minimum.
(e) Setback Distances. Where sprinkler
irrigation is used, recycled water must not be sprayed onto an area where food
is being prepared or served, or onto a drinking fountain.
(f) Access and Exposure. When using recycled
water for an agricultural or horticultural purpose where spray irrigation is
used, or an industrial, commercial, or construction purpose, the public and
personnel at the use area must be notified that the water used is recycled
water and is not safe for drinking. The recycled water use plan must specify
how notification will be provided.
(g) Site Management. When using recycled
water for a landscape impoundment, restricted recreational impoundment,
nonrestricted recreational impoundment, or for irrigating a golf course,
cemetery, highway median, industrial or business campus, park, playground,
school yard, residential landscape, or other landscapes accessible to the
public, signs must be posted at the use area or notification must be made to
the public at the use area indicating recycled water is used and is not safe
for drinking. Therecycled water use plan must specify how notification will be
provided.
Stat. Auth.: ORS 468.020, 468.705 & 468.710
Stats. Implemented: ORS 468B.030 &
468B.050