KY Water Operator key terms

A saturated underground layer of sand, gravel, or rock that stores and transmits water in usable quantities. Wells draw from it, and its recharge area needs protection from surface contamination.

A state-conducted evaluation of a public water system's intake or wells that identifies potential contamination sources and rates the system's susceptibility. Results inform monitoring waivers and protection planning.

The surface and subsurface zone around a well through which contaminants could reach the well within a set travel time. Land use within it is managed to prevent groundwater contamination.

Untreated water taken from a source such as a river, lake, or well before any treatment is applied. Its quality determines the coagulant dose, filter design, and disinfection strategy needed.

The cloudiness of water caused by suspended particles that scatter light. Measured in nephelometric turbidity units, it is a key indicator of filtration performance and microbial risk.

The highest concentration of a regulated contaminant allowed in water delivered to consumers, set as close to the health goal as feasible. Exceeding it is a monitoring and reporting violation.

A non-enforceable health-based target for a contaminant, set at a level with no known or anticipated adverse health effects. It guides the enforceable limit but allows for treatment feasibility and cost.

A required practice or procedure, such as filtration or corrosion control, used when a contaminant cannot be reliably measured at the tap. Failure to perform it is a rule violation.

The required process of informing customers about violations, exceedances, or other situations that may affect their health. Tiers set deadlines ranging from 24 hours to one year depending on risk.

The amount of chemical, such as alum or ferric chloride, added per volume of water to destabilize particles. It is set by jar testing and adjusted for changes in raw water quality.

A bench-scale simulation of coagulation, flocculation, and settling run in matched beakers to select chemical doses and mixing conditions. Operators use it to respond to changes in raw water.

Gentle, prolonged stirring that encourages destabilized particles to collide and grow into larger, settleable flocs after rapid mixing. Its intensity and duration strongly influence settling and filter loading.

A measure of the electrical charge at the boundary between a particle and surrounding water. Highly negative values keep particles repelling each other; coagulation aims to reduce that repulsion.

A tank that provides quiet detention so floc can settle out before filtration. Design and operation focus on overflow rate, detention time, and sludge removal.

The flow through a settling basin divided by its surface area, expressed as flow per unit area per day. It predicts whether particles of a given settling velocity will be removed.

The granular material, such as sand, anthracite, or garnet, through which water passes to remove remaining particles. Media type, depth, and size distribution determine filtration performance.

Reversing flow upward through a filter at a rate that expands the media and flushes captured solids to waste. Adequate backwash restores run length and prevents mudball formation.

The period a filter operates between backwashes. A run ends when head loss reaches its limit or effluent turbidity rises, whichever occurs first.

The blended water from all filters at a plant, sampled to judge overall filtration performance against the turbidity limit. Individual filter monitoring applies separately.

The product of disinfectant residual concentration and contact time used to demonstrate inactivation of pathogens. Required CT varies with disinfectant, target organism, temperature, and pH.

A way of expressing pathogen reduction as powers of ten, so 3-log means a 99.9 percent reduction. Rules specify required log credits for viruses, Giardia, and Cryptosporidium.

Chemicals such as trihalomethanes and haloacetic acids formed when disinfectants react with natural organic matter. Their limits push plants to balance disinfection against organic precursor removal.

A measure of organic material in water, much of it natural and a precursor to disinfection byproducts. Enhanced coagulation targets its removal before disinfection.

Adding disinfectant at points within the distribution system to maintain a residual in distant areas. It must be managed to avoid excessive byproduct formation.

A distribution main that terminates without looping back to another main. Water stagnates there, reducing residual and raising the risk of biofilm and taste complaints.

A pressure surge caused by sudden changes in flow velocity, such as rapid valve closure. It can rupture pipes and damage fittings, so slow-closing valves and surge protection are used.

A graph showing the head a pump develops across a range of flow rates. It is matched against the system curve to find the operating point.

The absolute pressure margin at a pump suction that keeps liquid from vaporizing and causing cavitation. Available margin must exceed the pump's required value.

A valve that automatically lowers a higher upstream pressure to a steady, safer downstream pressure. It protects plumbing and helps control leakage in lower service areas.

Any actual or potential link between a potable water system and a source of contamination or nonpotable fluid. Each one requires either removal or protection by an approved backflow preventer.

A physical separation between a supply outlet and the flood-level rim of a receiving vessel. It is the most reliable backflow protection because it has no moving parts.

A testable backflow preventer with two check valves and a relief valve that discharges if a check fails. It protects against both backpressure and backsiphonage hazards.

The unit reported by a turbidimeter that measures light scattered at a defined angle by particles in a sample. It is the standard unit for regulatory turbidity limits.

A documented record of who collected, handled, and transported a sample, with dates and signatures at each step. It establishes that results reflect the water sampled.

A single sample taken at one place and time rather than a flow-proportioned composite. It is used for bacteriological and other tests where timing matters.

A space large enough to enter, with limited entry or exit, not designed for continuous occupancy. Entry requires an evaluation, permit, attendant, and atmospheric testing.

The procedure of isolating energy sources and applying locks and tags before maintenance so equipment cannot start unexpectedly. Each worker applies a personal lock.

An annual notice to customers summarizing source water, detected contaminants, compliance, and health information. It must be delivered by the deadline set by rule.

The state-issued credential showing an operator has met education, experience, and examination requirements for a system classification. Renewal depends on continuing education.