North Dakota Administrative Code › Title 33.1 - Department of Environmental Quality › Article 33.1-16 - Control, Prevention, and Abatement of Pollution of Surface Water › Chapter 33.1-16-02.1 - Standards of Quality for Waters of the State › Table 1 - MAXIMUM LIMITS FOR SUBSTANCES IN OR CHARACTERISTICS OF CLASSES I, IA, II, AND III STREAMS

Current through Supplement No. 393, July, 2024
CAS1 No
								.
Substance or Characteristic
(a = aquatic life)
(b = municipal & domestic drinking
								water)
(c = agricultural, irrigation,
								industrial)
(d = recreation)
Maximum Limit
7429905
Aluminum2
								(a)
Acute Standard
750 micrograms per liter (µg/l)
Chronic Standard
87 µg/l
Where the pH is equal to or greater than 7.0, and
								the hardness is equal to or greater than 50 mg/l as
								CaCO3 in the receiving water after mixing, the 87
								µg/l chronic total recoverable aluminum criterion will not apply, and
								aluminum will be regulated based on compliance with the 750 µg/l acute
								total recoverable aluminum criterion.
7446-41-7
Ammonia (Total as N) (a)
Acute Standard
The one-hour average concentration of total ammonia
								as nitrogen in mg/l does not exceed, more often than once every three years on
								the average, the numerical value given by the following:
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Where Oncorhynchus are absent; or
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Where Oncorhynchus are present
Chronic
							 Standard
The 30-day rolling average concentration of total
								ammonia as nitrogen expressed in mg/l is not to exceed, more than once every
								three years on average, the chronic criteria magnitude calculated using the
								following formula:
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In addition, the highest four-day average within
								the 30-day averaging period should not be more than 2.5 times the criteria more
								than once in three years on average.
7440-39-3
Barium (Total) (b)
1.0 mg/l (1-day arithmetic average)
7440-42-8
Boron (Total) (c)
0.75 mg/l (30-day arithmetic average)
16887-00-6
Chloride (Total) (a, b, c)
Class I:
100 mg/l (30-day arithmetic
								average)
Class IA:
175 mg/l (30-day arithmetic
								average)
Class II and Class III:
250 mg/l
								(30-day arithmetic average)
7782-50-5
Chlorine Residual (Total) (a)
Acute:
0.019 mg/l
Chronic:
0.011 mg/l
None
Cylindrospermopsin (d)
15 µ/l For Clean Water Act water quality
								criterion, no more than 3 excursions (10-day assessment periods) within a
								single recreational season in a single year.
None
Microcystins (d)
8 µ/l For Clean Water Act water quality
								criterion, no more than 3 excursions (10-day assessment periods) within a
								single recreational season in a single year.
7782-44-7
Dissolved Oxygen (a)
5 mg/l as a daily minimum (up to 10% of
								representative samples collected during any 3-year period may be less than this
								value provided that lethal conditions are avoided)
14797-55-8
Nitrate as N3 (a,
								b)
1.0 mg/l (up to 10% of samples may
								exceed)
14797-65-0
Nitrite as N (b)
1.0 mg/l
None
E. coli4
								(d)
Not to exceed 126 organisms per 100 ml as a
								geometric mean of representative samples collected during any 30-day
								consecutive period, nor shall more than 10 percent of samples collected during
								any 30-day consecutive period individually exceed 409 organisms per 100 ml. For
								assessment purposes, the 30-day consecutive period shall follow the calendar
								month. This standard shall apply only during the recreation season May 1 to
								September 30.
None
pH (a)
Class I and IA:
6.5 - 9.0 (up to 10%
								of representative samples collected during any 3-year period may exceed this
								range, provided that lethal conditions are avoided).
Class II and Class III:
6.0 - 9.0 (up
								to 10% of representative samples collected during any 3-year period may exceed
								this range, provided that lethal conditions are avoided).
108-95-2
Phenols (Total) (b)
0.3 mg/l (organoleptic criterion) (one-day
								arithmetic average)
7782-49-2
Selenium in Fish
Flesh5
								(a)
Egg-Ovary:
15.1 mg/kg Dry
								Weight
Whole Body:
8.5 mg/kg Dry
								Weight
Muscle:
11.3 mg/kg Dry
								Weight
7440-23-5
Sodium (b, c)
Class I:
50 percent of total cations
								as milliequivalents per liter (mEq/l)
Class IA, II, and III:
60 percent of
								total cations as mEq/l
18785-72-3
Sulfates (Total as SO4)
								(b)
Class I:
250 mg/l (30-day arithmetic
								average)
Class IA and II:
450 mg/l (30-day
								arithmetic average)
Class III:
750 mg/l (30-day arithmetic
								average)
Sulfates (Total as SO4) (a,
								b)
Site Specific:
750 mg/l (maximum)
								applies to the Sheyenne River from its headwaters to 0.1 mile downstream from
								Baldhill Dam
131.10(b) requirement:
The water
								quality standards for the Red River and the portions of the Sheyenne River
								located downstream from the segment of the Sheyenne River to which the
								site-specific sulfate standard applies must continue to be maintained. The
								Sheyenne River from 0.1 mile downstream from Baldhill Dam to the confluence
								with the Red River shall not exceed 450 mg/l sulfate (total) 30-day arithmetic
								average, and the Red River shall not exceed 250 mg/l sulfate (total) 30-day
								arithmetic average after mixing downstream from the confluence of the Sheyenne
								River. Regulated pollution control efforts must be developed to achieve
								compliance with these water quality standards.
None
Temperature (a)
Eighty-five degrees Fahrenheit [29.44 degrees
								Celsius]. The maximum increase shall not be greater than five degrees
								Fahrenheit [2.78 degrees Celsius] above natural background
								conditions.
None
Combined radium 226 and radium 228 (Total)
								(b)
5 pCi/l (30-day arithmetic average)
None
Gross alpha particle activity,
								including
15 pCi/l (30-day arithmetic average)
radium 226, but excluding radon and uranium
								(b)
1 CAS No. is the
								chemical abstract service registry number. The registry database contains
								records for specific substances identified by the chemical abstract
								service.
2 The US EPA 2018
								recommended national criteria (304(a) criteria) for aluminum can be used for
								site-specific chronic and acute criteria when appropriate and data is
								available. The criteria is based upon multiple linear regression (MLR) models
								for fish and invertebrate species. Data requirements are pH, DOC, and total
								hardness to quantify the effects of these water chemistry parameters on the
								bioavailability and associated toxicity of aluminum to aquatic
								organisms.
3 The standard for
								nitrates (N) is intended as benchmark concentration when stream or lake
								specific data is insufficient to determine the concentration that will cause
								excessive plant growth (eutrophication). However, in no case shall the
								concentration for nitrate plus nitrite N exceed 10 mg/l for any waters used as
								a municipal or domestic drinking water supply.
4 Where the E. Coli criteria
								are exceeded and there are natural sources, the criteria may be considered
								attained, provided there is reasonable basis for concluding that the indicator
								bacteria density attributable to anthropogenic sources is consistent with the
								level of water quality required by the criteria. This may be the situation, for
								example, in headwater streams that are minimally affected by anthropogenic
								activities.
5 Fish tissue elements
								are expressed as steady-state instantaneous measurement not to exceed the
								criteria in the table. When fish egg/ovary concentrations are measured, the
								egg/ovary criterion element supersedes any whole-body, or muscle criterion
								element. The fish flesh values in Table 1 and the water column criteria in
								Table 2 are independently applicable. Water column criterion elements that are
								derived site-specifically using an empirical bioaccumulation factor approach or
								a bioaccumulation mechanistic model approach, once duly established under the
								provisions of 40 CFR
								131 will supersede the criteria in Table 2
								and will be subordinate to fish tissue criterion elements when both fish and
								water concentrations are measured. Any site-specific water column criterion
								element established under the provisions of
								40 CFR
								131 is the applicable criterion in the
								absence of fish tissue measurement, or in waters with new discharges of
								selenium where steady state has not been achieved between water and fish tissue
								at the site.