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 - WATER QUALITY CRITERIA [1] (MICROGRAMS PER LITER)

Current through Supplement No. 393, July, 2024
CAS 
							 1 No.
Substance or Characteristic
(a = aquatic life)
(b = municipal & domestic drinking
							 water)
(c = agricultural, irrigation,
							 industrial)
(d = recreation)
Maximum Limit
7429905
Aluminum (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)
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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
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 N2 (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. coli3 (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 Fish4 Flesh
							 (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 radium 226,
							 but excluding radon and uranium (b)
15 pCi/l (30-day arithmetic average)
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 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.
3 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.
4 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.