949.05 MINIMUM CONDITIONS AND QUALITY CRITERIA.
The following minimum conditions and quality criteria are established for the prevention, control and abatement of new or existing pollution of the waters within the scope of this chapter.
(a) Minimum Conditions Applicable to All Such Waters at All Places and at All Times.
(1) Free from substances attributable to municipal, industrial or other discharges, or agricultural practices that will settle to form putrescent or otherwise objectionable sludge deposits.
(2) Free from floating debris, oil, scum and other floating materials attributable to municipal, industrial or other discharges, or agricultural practices in amounts sufficient to be unsightly or deleterious.
(3) Free from materials attributable to municipal, industrial or other discharges, or agricultural practices producing color, odor or other conditions in such degree as to create a nuisance.
(4) Free from substances attributable to municipal, industrial or other discharges, or agricultural practices in concentrations or combinations which are toxic or harmful to human, animal, plant or aquatic life.
(b) Stream- Quality Criteria for Public Water Supply. The following criteria are for evaluation of stream quality at the point at which water is withdrawn for treatment and distribution as a potable supply:
(1) Bacteria. Coliform group not to exceed 5,000 per 100 milliliters as a monthly average value (either MPN or MF count); nor exceed this number in more than twenty percent (20%) of the samples examined during any month; nor exceed 20,000 per 100 milliliters in more than five percent (5%) of such samples.
(2) Threshold-odor number. Not to exceed 24 (at sixty degrees Centigrade) as a daily average.
(3) Dissolved solids. Not to exceed 500 milligrams per liter (mg/1) as a monthly average value, nor exceed 750 milligrams per liter at any time .
(4) Radioactivity. Gross beta activity not to exceed 1,000 picocuries per liter (pCi/l), nor shall activity from dissolved strontium-90 exceed 10 pCi/l, nor shall activity from dissolved alpha emitters exceed 3 pCi/l.
(5) Chemical constituents. Not to exceed the following specified concentrations at any time:
Constituent | Concentration (mg/l) |
Arsenic
| 0.05
|
Barium
| 1.0
|
Cadmium
| 0.01
|
Chromium (hexavalent)
| 0.05
|
Cyanide
| 0.025
|
Fluoride
| 1.0
|
Lead
| 0.05
|
Selenium
| 0.01
|
Silver
| 0.05
|
(Ord. 70-126. Passed 3-3-70.)