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Related Concept Videos

Microbes in Beverage Production01:25

Microbes in Beverage Production

Alcoholic beverages such as wine, beer, and spirits are the products of microbial fermentation processes that transform simple sugars into ethanol and a wide array of complex flavor compounds. These transformations rely on the metabolic activities of specific yeasts and bacteria, which are selected and controlled to yield the desired beverage characteristics.Wine Fermentation and MaturationWine production begins with the crushing of grapes to release juice and pulp, forming a must that is...
Quality of Water01:19

Quality of Water

In concrete preparation, the quality of water is paramount as it affects the strength and durability of the concrete. Potable water is usually preferred; however, it must not have excessive sodium or potassium to prevent compromising the concrete's integrity. Water quality is typically evaluated based on impurities such as dissolved solids, chlorides, and sulfates, and its pH value is ideally between 6 and 8. Even slightly acidic natural water may be acceptable unless it contains harmful...
Regulation of Water Intake01:25

Regulation of Water Intake

Osmolality refers to the number of solute particles per kilogram of solvent in a solution. Plasma osmolality specifically indicates the total number of solute particles per kilogram of water in blood plasma. This value reflects the body's hydration status and is tightly regulated through mechanisms controlling water intake and output. While water consumption is a conscious decision, the body has intrinsic regulatory systems to maintain fluid balance. Dehydration, a state of water deficit...
Testing Water Quality01:14

Testing Water Quality

When the quality of water for concrete preparation is uncertain, its impact on the setting time of cement and compressive strength of mortar is assessed by comparison with de-ionized or distilled water benchmarks. American Society for Testing and Materials (ASTM) C1602 requires the setting times to be within 90 minutes of the control, British Standard (BS) 3146:1980 allows a 30-minute variance in the initial setting, while British Standards European Norm (BS EN) 1008 specifies initial setting...
Regulation of Water Output01:26

Regulation of Water Output

The human body predominantly expels water through the urinary system. On average, an individual generates around 1.5 liters of urine each day. This amount can fluctuate based on how well a person is hydrated, but a critical minimum quantity of urine must be produced to ensure the body's proper functioning. Daily, the kidneys remove 600 to 1200 milliosmoles of dissolved substances, effectively excreting excess minerals and water-soluble toxins such as creatinine, urea, and uric acid from the...
States of Water01:23

States of Water

Water exists in any one of the three classical states: solid (ice), liquid (water), and gas (steam or water vapor). The state of water depends on i) the intermolecular forces that draw molecules together and ii) the kinetic energy that leads to movements that pull them apart.
Water freezes when the intermolecular forces are greater than the kinetic energy. Unlike most other substances, water is less dense in its solid state than in its liquid state. This is because each water molecule can form...

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Related Experiment Video

Updated: Jun 22, 2026

A Modified EPA Method 1623 that Uses Tangential Flow Hollow-fiber Ultrafiltration and Heat Dissociation Steps to Detect Waterborne Cryptosporidium and Giardia spp.
12:11

A Modified EPA Method 1623 that Uses Tangential Flow Hollow-fiber Ultrafiltration and Heat Dissociation Steps to Detect Waterborne Cryptosporidium and Giardia spp.

Published on: July 9, 2012

Beverages: bottled water. Final rule.

    Federal Register
    |June 11, 2009
    PubMed
    Summary

    The FDA now requires bottled water companies to test source water for E. coli. This ensures bottled water safety and aligns regulations with public drinking water standards.

    Area of Science:

    • Food Safety
    • Microbiology
    • Regulatory Science

    Background:

    • Current regulations require testing of finished bottled water for total coliform.
    • Source water testing for coliforms is not consistently mandated.
    • Escherichia coli (E. coli) is a key indicator of fecal contamination.

    Purpose of the Study:

    • To update bottled water regulations regarding microbial contamination.
    • To mandate testing of source water for coliforms and E. coli.
    • To ensure public health protection by aligning bottled water standards with public drinking water regulations.

    Main Methods:

    • Amending Food and Drug Administration (FDA) bottled water regulations.
    • Requiring source water testing for total coliform and E. coli.

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  • Establishing adulteration criteria for bottled water containing E. coli.

    • Main Results:

    • Bottled water manufacturers must now test source water for total coliform.
    • Detection of E. coli in source or finished bottled water necessitates further investigation and corrective actions.
    • Source water testing positive for E. coli will prohibit its use until contamination is rectified.

    Conclusions:

    • The updated FDA regulations enhance bottled water safety by addressing fecal contamination at the source.
    • These changes ensure bottled water quality is at least as protective as Environmental Protection Agency (EPA) standards for public drinking water.
    • Mandatory E. coli testing and source water remediation strengthen public health safeguards in the bottled water industry.