Connecticut Administrative Code › Title 25 - Water Resources, Flood and Erosion Control › 32d - Source Water Protection Measures › Section 25-32d-1a - Definitions

Current through July 10, 2024
(a) As used in sections
			 25-32d-1 a to
			 25-32d-6, inclusive, of the Regulations of Connecticut State Agencies:
(1) "1 in 100 occurrence frequency" means the
			 1 in 100 year recurrence interval for the critical dry period or the one
			 percent non-exceedance probability for the critical drawdown
			 duration;
(2) "Active source" means
			 a department approved source of supply which meets state and federal water
			 quality standards, with adequate department approved treatment facilities as
			 needed, or for which compliance schedules are in place. An active source is one
			 that is permanently connected to the system and may include, but need not be
			 limited to, a seasonal or standby source of supply that may be used
			 intermittently or on a partial year basis;
(3) "Adequate water supply" means a quantity
			 of water sufficient to meet demands even in a critical dry period;
(4) "Available water" means the maximum
			 amount of water a company can dependably supply, taking into account the
			 following reductions applied to safe yield: any limitations imposed by
			 hydraulics, treatment, well pump capabilities, reductions of well yield due to
			 clogging that can be corrected with redevelopment, transmission mains, permit
			 conditions, source construction limitations, approval limitations, or
			 operational considerations; and the safe yield of active sources and water
			 supplied according to contract, provided that the contract is not subject to
			 cancellation or suspension and assures the availability of water throughout a
			 period of drought and that the supply is reliable;
(5) "Average daily demand" means the total
			 annual production from all sources of supply divided by the number of days in
			 that calendar year;
(6)
			 "Commissioner" means the Commissioner of Public Health or his designated
			 representative;
(7) "Complete plan"
			 means a plan that satisfies the content requirements of sections
			 25-32d-2
			 to
			 25-32d-4,
			 inclusive, of the Regulations of Connecticut State Agencies and that is
			 technically adequate for its intended purpose;
(8) "Conservation" or "water conservation"
			 means measures designed to promote efficient use of water and to eliminate
			 waste of water;
(9) "Consumptive
			 losses" means any water uses which do not result in the water being discharged
			 back into the water source at or near the withdrawal point in substantially the
			 same quality and quantity as prior to use;
(10) "Contaminant" means any physical,
			 chemical, biological, or radiological substance or matter in water.
(11) "Critical drawdown duration" means the
			 length of time for a reservoir to go from full to the bottom of usable storage
			 for single-year cycle reservoirs, and from full to the bottom of usable storage
			 without spilling in the intervening period for multi-year cycle
			 reservoirs;
(12) "Critical dry
			 period" means the historic drought event for which yield is the least. For
			 surface water sources of supply the critical dry period has both a critical
			 drawdown duration and a 1 in 100 occurrence frequency. For ground water sources
			 of supply the critical dry period is the 180 day pumping event with no
			 precipitation recharge and a seven day duration and a one in ten year
			 recurrence frequency of the stream flow;
(13) "Critical Lands to be protected" means
			 any land located within a source water protection area;
(14) "Critical system component" means any
			 water system component or facility necessary to deliver, with at least
			 twenty-five pounds per square inch of pressure, one hundred percent of the
			 average daily demand of the system or any portion of the system that it
			 serves;
(15) "Demand management"
			 means conservation measures which provide assistance for consumers to use water
			 economically and efficiently and that may achieve permanent water
			 savings;
(16) "Department" means
			 the Department of Public Health or its designated representative;
(17) "Emergency source" means a source of
			 supply identified by the water company within its water supply emergency
			 contingency plan for possible use at various stages of an emergency. An
			 emergency source is not an active source and is not considered part of
			 available water. An emergency source may be prohibited from use as a source of
			 supply due to contractual limitations, lack of water quality monitoring, known
			 or suspected water quality limitations, the need for additional treatment prior
			 to use, or the absence of any required state and local approval;
(18) "Flashboards" means temporary or
			 semi-permanent structures across the spillway of a reservoir. Flashboards
			 increase water levels and storage volumes that are designed to be released
			 during flood events;
(19) "Inactive
			 source" means a source of supply that is not used or maintained as an active or
			 emergency source of supply, but has not been abandoned in accordance with
			 Section
			 25-33k
			 of the Connecticut General Statutes, is not routinely monitored, and is
			 physically disconnected from the system;
(20) "Initial plan" means the first plan for
			 a water company ever requested by the commissioner pursuant to section
			 25-32d of the
			 Connecticut General Statutes;
(21)
			 "Major users" means the ten water customers with the greatest annual volumes of
			 water use for the most recent calendar year and all other users with individual
			 meters or estimated use exceeding an annual average of 50,000 gallons of water
			 per day based on the most recent calendar year;
(22) "Margin of safety" means the unitless
			 ratio of available water to demand;
(23) "Mass balance methodology" means a
			 technique based on the continuity equation, in which the sum of all water
			 inflows minus the sum of all water outflows is equal to the change in storage.
			 Inflows include streamflow, direct precipitation, diversions, routing from
			 upstream reservoirs, ground water discharge, and supplementation from wells.
			 Outflows include water supply withdrawals, streamflow releases, evaporation,
			 diversions, consumptive losses, groundwater recharge, uncontrolled releases
			 downstream orspills from the reservoir, and dam leakage;
(24) "Maximum month demand" means the highest
			 water demand in a month calculated by dividing the total production from all
			 sources of supply for each calendar month by the number of days in that month
			 and expressed in gallons per day;
(25) "Minimum stream flow releases" means
			 water released from a reservoir for the purpose of providing a specified flow
			 rate downstream of a dam. The flow requirements may be fixed or
			 variable;
(26) "Modified plan"
			 means any amendments, modifications or page revisions to an initial or revised
			 plan as requested by the commissioner or submitted by a water company in order
			 to satisfy the requirements for completeness or plan approval;
(27) "Non-revenue water" means the difference
			 between total annual metered water production and the sum of annual metered
			 water consumption plus any other properly estimated revenue-producing unmetered
			 water;
(28) "Peak day demand" means
			 the annual maximum daily rate of water use measured in gallons per
			 day;
(29) "Planning periods" means
			 time periods for projecting future demands for planning to meet future water
			 supply needs. Planning periods are five years from the time of plan preparation
			 and twenty years (20) and fifty (50) years from the last decennial
			 census;
(30) "Public or
			 privately-owned protected lands" means any combination of state forest,
			 parklands and municipally or privately held land, excluding water company-owned
			 lands, designated as protected open space in a delineated source water
			 protection area;
(31) "Regional
			 planning organization" means regional planning agencies created pursuant to the
			 provisions of sections
			 8-31a to 8-37b,
			 inclusive, of the Connecticut General Statutes, regional councils of elected
			 officials created pursuant to the provisions of sections 4-124c to
			 4-124h, inclusive, of
			 the Connecticut General Statutes, where such councils have undertaken to
			 exercise the powers of regional planning agencies and regional councils of
			 governments created pursuant to the provisions of sections
			 4-124i
			 to
			 4-124p,
			 inclusive, of the Connecticut General Statutes;
(32) "Revised plan" means any subsequent plan
			 requested by the commissioner or submitted by a water company pursuant to
			 section
			 25-32d of the
			 Connecticut General Statutes after the initial plan and excluding modified
			 plans;
(33) "Safe yield" means the
			 maximum dependable quantity of water per unit of time which may flow or be
			 pumped continuously from a source of supply during a critical dry period
			 without consideration of available water limitations;
(34) "Source of supply" means any well,
			 spring, reservoir, stream, river or other location where water is siphoned,
			 pumped, channeled, or withdrawn for water supply purposes, including
			 interconnections with other water companies;
(35) "Source water assessment program" (SWAP)
			 means a program adopted by the State to evaluate the susceptibility of public
			 water supply sources to potential sources of contamination, pursuant to the
			 federal Safe Drinking Water Act (SDWA) Amendments of 1996,
			 42 U.S.C. Section
			 300j-13;
(36) "Source Water Assessment Program Work
			 Plan" means the strategy plan prepared by the Department of Public Health to
			 implement the provisions of the Source Water Assessment Program.
(37) "Source Water Assessment Report" means
			 the official document created by the Department of Public Health pursuant to
			 the Safe Drinking Water Act (SDWA) Amendments of 1996,
			 42 U.S.C. Section
			 300j-13;
(38) "Source water protection area" means an
			 area of land delineated by the state Source Water Assessment Program (SWAP),
			 and identified in the Connecticut Source Water Assessment Program Work Plan,
			 that contributes water to any public water supply source where significant
			 potential contaminant sources (SPCS) are identified, evaluated, and inventoried
			 in order to protect the purity of any public water supply source;
(39) "Stabilization" means a condition
			 measured during a pumping test when no more than a total of 0.25 feet of
			 drawdown occurs over the last twelve hours prior to completion of the test or,
			 where drawdown cannot be determined to that accuracy due to equipment
			 inadequacy, no more than a total of 1.0 foot;
(40) "State agency" means the Department of
			 Public Health, the Department of Environmental Protection, the Department of
			 Public Utility Control, or the Office of Policy and Management, as
			 applicable;
(41) "Supply deficient"
			 means a supply of available water insufficient to meet average daily demand,
			 maximum month demand, or peak day demand;
(42) "Supply management" means conservation
			 measures which improve the efficiency of and eliminate waste in the production
			 and distribution of water within a system;
(43) "Usable storage" means the difference
			 between total storage volume of a water supply reservoir and the remaining
			 volume below the minimum operational level, intake pipe elevation, or water
			 elevation above which water can be treated to meet water quality standards,
			 whichever is least;
(44) "User
			 category" means metered residential, metered commercial, metered industrial,
			 metered public authorities, unmetered residential, unmetered commercial,
			 unmetered industrial, unmetered public authorities, and non-revenue water.
			 Residential includes apartments and condominiums;
(45) "Water company" or "company" means a
			 water company as defined in Section
			 25-32a
			 of the Connecticut General Statutes;
(46) "Water supply emergency contingency
			 plan" means response procedures and preparations for water supply emergencies
			 due to contamination, power outages, drought, flood or failure of any or all
			 critical system components by natural or manmade events;
(47) "Water supply emergency" means any event
			 that may adversely impact the quality or quantity of potable water supplies
			 such that it may not be sufficient to serve customers in accordance with the
			 provisions of the Public Health Code;
(48) "Water supply system" means any
			 combination of interconnected sources and facilities for the purposes of
			 supplying potable water which are owned and operated by the same water company;
			 and
(49)