A. 
No person shall discharge or cause to be discharged any unpolluted waters such as stormwater, groundwater, roof runoff, subsurface drainage or cooling water to any sanitary sewer.
B. 
Stormwater and all other unpolluted drainage shall be discharged to such sewers as are specifically designated as combined sewers or storm sewers and discharged to a watercourse in accordance with all applicable state and federal laws and regulations.
No person shall discharge or permit to be discharged from property under his control into a storm sewer or watercourse any waste or water which is polluted with organic or other matter which can decay, which is odorous, oily or unsightly or for any other reason is likely to or does give offense or cause damage or injury to nearby persons or property when discharged into a watercourse. No wastewater which is poisonous to persons, animals or fish, when discharged into any watercourse, shall be discharged into any storm sewer. No coarse rubbish, sticks, large solids, offal, feathers, straw, debris, cinders, ashes, scraps, leaves, oil, grease, combustible substance or similar materials shall be permitted to enter any storm sewer. No material, the discharge of which into natural streams, ponds or lakes is prohibited by state or federal laws or regulations, shall be discharged into any storm sewer.
No user shall contribute or cause to be contributed, directly or indirectly, any pollutant or wastewater which will interfere with the operation or performance of the WPCF. These general prohibitions apply to all such users of a WPCF, whether or not the user is subject to National Categorical Pretreatment Standards or any other federal or state pretreatment standards or requirements. A user shall not contribute the following substances to any WPCF:
A. 
Any liquids, solids or gases which, by reason of their nature or quantity, are or may be sufficient, either alone or by interaction with other substances, to cause fire or explosion or be injurious in any other way to the WPCF or to the operation of the WPCF. At no time shall two successive readings on an explosion hazard meter, at the point of discharge into the sewage collection system or at any point in the system, be more than 5% nor any single reading over 10% of the lower explosive limit (LEL) of the meter.
B. 
Solids or viscous substances which may cause obstruction to the flow in a sewer or other interference with the operation of the WPCF, including substances such as but not limited to grease, garbage with particles greater than 1/2 inch in any dimension, animal guts or tissues, paunch, manure, bones, hair, hides or fleshings, entrails, whole blood, feathers, ashes, cinders, sand, spent lime, stone or marble dust, metal, glass, straw shavings, grass clippings, rags, spent grains, spent hops, wastepaper, wood, plastics, gas, tar, asphalt residues, residues from refining or processing of fuel or lubricating oil, mud or glass grinding or polishing wastes.
C. 
Any sewage having a pH lower than 5.5 or having any other corrosive property capable of causing damage or hazard to structures, equipment and personnel of the WPCF. The upper limit of pH for any industrial wastewater discharge shall be established under the discharger's state discharge permit.
D. 
Any sewage containing toxic pollutants in sufficient quantity, either singly or by interaction with other pollutants, to injure or interfere with any wastewater treatment process, constitute a hazard to humans or animals or plant life, create a toxic effect in the receiving waters of the WPCF or exceed the limitation set forth in a Categorical Pretreatment Standard. A toxic pollutant shall include but not be limited to any pollutant identified pursuant to Section 307(a) of the Act.
E. 
Any noxious or malodorous sewage, gases or solids which, either singly or by interaction with other sewage, are sufficient to prevent entry into the public sewers for their maintenance and repair.
F. 
Any sewage which, by interaction with other sewage in the public sewer, releases obnoxious gases, forms suspended solids which interfere with the collection system or creates a condition which may be deleterious to structures and treatment processes or which may cause the effluent limitations of the WPCF's NPDES permit to be exceeded.
G. 
Any substance which may cause the WPCF's effluent or any other product of the WPCF, such as residues, sludges or scums, to be unsuitable for reclamation process where the WPCF is pursuing a reuse and reclamation program. In no case shall a substance discharged to the WPCF cause the facility to be in noncompliance with sludge use or disposal criteria, guidelines or regulations developed under Section 405 of the Act, any criteria, guidelines or regulations affecting sludge use or disposal developed pursuant to the Resource Conservation and Recovery Act, the Clean Air Act, the Toxic Substances Control Act or state criteria applicable to the sludge management method being used.
H. 
Any substance which will cause a WPCF to violate its NPDES permit or the receiving water quality standards.
I. 
Sewage containing substances which are not amenable to treatment or reduction by the wastewater treatment process employed or are amenable to treatment only to such degree that the water pollution control facility effluent cannot meet the limits stipulated in the NPDES city's permit.
The following described substances, materials, waters or waste shall be limited in discharges to public sewers to concentrations or quantities which will not harm either the sewers or the water pollution control facility, will not have an adverse effect on the receiving stream or will not otherwise endanger public property or constitute a nuisance. The Commissioner may set lower limitations if more severe limitations are necessary to meet the water quality standards of the receiving stream. The limitations or restrictions on materials or characteristics of sewage discharges to the public sewer are as follows:
A. 
Sewage having a temperature higher than 150° F. (65° C.).
B. 
Sewage containing fat, wax, grease, petroleum or mineral oil, whether emulsified or not, in excess of 100 milligrams per liter, with floatable oil not to exceed 20 milligrams per liter, or containing substances which may solidify or become viscous at temperatures between 32° and 150° F. (0° and 65° C.).
C. 
Any garbage that has not been properly shredded. (See the definition of "properly shredded garbage" in § 191-3A.) Garbage grinders may be connected to sanitary sewers from homes, hotels, institutions, restaurants, hospitals, catering establishments or similar places where garbage originates from the preparation of food in kitchens for the purpose of consumption on the premises or when served by caterers.
D. 
Any sewage containing odor-producing substances exceeding limits which may be established by the Commissioner.
E. 
Any radioactive wastes or isotopes of such half-life or concentration as may exceed limits established by the Commissioner in compliance with all applicable state and federal regulations.
F. 
Materials which exert or cause:
(1) 
Unusual concentrations of inert suspended solids, such as but not limited to sodium chloride and sodium sulfate.
(2) 
Excessive discoloration, such as but not limited to dye wastes and vegetable tanning solutions.
(3) 
Unusual BOD, chemical oxygen demand or chlorine demand in such quantities as to constitute a significant load on the water pollution control facility.
(4) 
Unusual volume of flow or concentrations of wastes constituting a slug as defined in § 191-3A.
G. 
Overflow from holding tanks or other receptacles storing organic wastes.
H. 
Sewage with a concentration of pollutants in excess of the following limits:
Pollutant
Concentration, in Parts Per Million
(milligrams per liter)
Arsenic as AS
0.05
Barium as Ba
5.0
Boron as BO
5.0
Cyanides as CN (amenable)
0.1
Floride as F
20
Chromium (total)
1.0
Chromium (Cr6)
0.1
Magnesium as Mg
100
Manganese as Mn
5.0
Copper as Cu
1.0
Zinc as Zn
1.0
Cadmium
0.1
Lead
0.1
Tin
2.0
Silver
0.1
Mercury
0.01
Nickel
1.0
NOTE: All metals are to be measured as total metals.
A. 
[1]In accordance with Section 22a-430 of the Connecticut General Statutes, as amended, a permit from the Commissioner of Environmental Protection is required prior to the initiation of a discharge of any of the following wastewaters to a public sewer:
(1) 
Industrial wastewater of any quantity.
(2) 
Domestic sewage in excess of 5,000 gallons per day through any building sewer to a public sewer.
[1]
Editor's Note: Amended at time of adoption of Code; see Ch. 1. General Provisions, Art. I.
B. 
A potential discharger must submit a permit application to the Department of Environmental Protection not later than 90 days prior to the anticipated date of initiation of the proposed discharge.
A. 
[1]If any sewage is discharged or is proposed to be discharged to the public sewers which contains the substances or possesses the characteristics enumerated in § 191-29 of this chapter and which, in the judgment of the Commissioner, may have a deleterious effect upon the wastewater facilities, processes, equipment or receiving waters or which otherwise may create a hazard to life or constitute a public nuisance, the Commissioner may, in accordance with Section 22a-430(b) of the Connecticut General Statutes, as amended:
(1) 
Reject the discharge of the wastes.
(2) 
Require pretreatment to an acceptable condition for discharge to the public sewers.
(3) 
Require control over the quantities and rates of discharge.
[1]
Editor's Note: Amended at time of adoption of Code; see Ch. 1., General Provisions, Art. I.
B. 
If the Commissioner permits the pretreatment or equalization of waste flows, the design and installation of the equipment shall be subject to the review and approval of the Commissioner, subject to the requirements of all applicable codes, ordinances and laws.
C. 
The Superintendent shall have the right to reject the discharge of any wastes or require more stringent effluent limitations than required by the user's Section 22a-430 permit, the decisions of the Commissioner notwithstanding.[2]
[2]
Editor's Note: Amended at time of adoption of Code; see Ch. 1, General Provisions, Art. I.
Grease, oil and gross particle separators shall be provided when, in the opinion of the Commissioner, they are necessary for the proper handling of sewage containing floatable grease in excessive amounts, as specified in § 191-29B, or any flammable wastes, sand or other harmful substances, except that such separators shall not be required for private living quarters or dwelling units. All separators shall be of a type and capacity approved by the Commissioner and shall be located as to be readily and easily accessible for cleaning and inspection. In the maintaining of these separators, the owner(s) shall be responsible for the proper removal and disposal by appropriate means of the captured material and shall maintain records of the dates and means of disposal, which are subject to review by the Commissioner. Any removal and hauling of the collected materials shall be performed by a waste disposal firm which possesses a valid permit from the Commissioner under Section 22a-429 of the Connecticut General Statutes, as amended.
[1]
Editor's Note: Amended at time of adoption of Code; see Ch. 1, General Provisions, Art. I.
Where pretreatment or flow-equalizing facilities are provided or required for any sewage, they shall be maintained continuously in satisfactory and effective operation by the owner(s) at his expense.
When required by the Commissioner or the Superintendent, the owner of any property serviced by a building sewer carrying industrial wastes shall install a suitable structure together with such necessary meters and other appurtenances in the building sewer to facilitate observations, sampling and measurement of the wastes. Such structure, when required, shall be accessible and safely located and shall be constructed in accordance with plans approved by the Commissioner and/or the Superintendent. The sampling structure shall be located at a point along the industrial waste stream where a representative sample of the industrial wastewater may be obtained prior to its being diluted by domestic sewage in the building sewer. The structure shall be installed by the owner at his expense and shall be maintained by him so as to be safe and accessible at all times.
All industries discharging into a public sewer shall perform such monitoring of their discharge as required by the Commissioner in any state discharge permit issued pursuant to Section 22a-430 of the Connecticut General Statutes, as amended, including but not limited to installation, the use and maintenance of monitoring equipment, keeping records and reporting the results to the Commissioner. Such records shall be made available upon request of the Commissioner or the Superintendent.
[1]
Editor's Note: Amended at time of adoption of Code; see Ch. 1, General Provisions, Art. I.
All measurements, tests and analyses of the characteristics of sewage to which reference is made in this chapter shall be determined in accordance with the latest edition of Standard Methods for Examination of Water and Wastewater, published by the American Public Health Association. Sampling methods, locations, times, durations and frequencies are to be determined on an individual basis, subject to the stipulations and general conditions of the discharger's state discharge permit.
No statement contained in this Article shall be construed as preventing any special agreement or arrangement between the city and any industrial concern whereby an industrial waste of unusual strength or character may be accepted by the city for treatment, provided that such agreements do not contravene any requirements of existing state or federal regulations and are compatible with any user charge system in effect. The city may request a special fee payment to cover the costs of treating these aforementioned industrial wastewaters.
Upon the promulgation of the Federal Categorical Pretreatment Standard for a particular industrial subcategory, the federal standard, if more stringent than limitations imposed under this chapter for sources in that subcategory, shall supersede the limitations imposed under this chapter.
No user shall increase the use of process water in an attempt to dilute a discharge as a partial or complete substitute for adequate treatment to achieve compliance with the limitations contained in the Federal Categorical Pretreatment Standards or in any specific pollutant limitations which may be developed by the Commissioner.
Each user shall provide protection from accidental discharge of prohibited materials or other substances regulated by this chapter. Facilities to prevent accidental discharge of prohibited materials shall be provided and maintained at the owner's or user's own cost and expense. The Commissioner may require that plans showing facilities and operating procedures be submitted for review and approval prior to construction of the facilities.
A. 
Within five days following an accidental discharge, the user shall submit to the Superintendent and the Commissioner a detailed written report describing the cause of the discharge and the measures to be taken by the user to prevent similar future occurrences. Such notification shall not relieve the user of any expense, loss, damage or other liability which may be incurred as a result of damage to the WPCF, fish kills, aquatic plants or any other damage to persons or property; nor shall such notification relieve the user of any fines, civil penalties or other liabilities which may be imposed by this chapter or other applicable laws.
B. 
A notice shall be permanently posted on the user's bulletin board or other prominent place advising employees whom to call in the event of a dangerous discharge. Employers shall ensure that all employees are advised of the emergency notification procedure.