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Ag Water 4+
University of Arizona
Diseñada para iPad
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- Gratis
Capturas de pantalla
Descripción
*OVERVIEW*
The Produce Safety Rule (PSR) requires growers to initially establish a Microbial Water Quality Profile (MWQP) for each untreated surface agricultural water source used during growing activities of covered produce (other than sprouts). The PSR must be applied for each water source using a direct water application method and annual surveys must be conducted for that water source in subsequent years. The water quality profile is based on the levels of generic E. coli in your agricultural water. The method of testing for generic E. coli must be conducted following U.S. Environmental Protection Agency (EPA) Method 1603. Methods other than 1603 may be used but they must be scientifically valid and shown to be at least equivalent to EPA Method 1603 in accuracy, precision, and sensitivity.
Ag Water app was developed to:
• Assist growers with GM and STV calculations to determine if their water meets the criteria for appropriate application to produce before harvest
• Assist growers with making water management decisions if their water does not meet the criteria in the Produce Safety Rule
• Evaluate current sampling conditions for irrigation water quality to determine the probability of microbial contamination
*Definitions:*
Agricultural water is defined in part "as water that is intended to, or likely to, contact the harvestable portion of covered produce or food-contact surfaces."
Geometric mean (GM): GM is essentially the average amount of generic E. coli in your water source. PSR criteria requires a GM at or below 126 E. coli CFU/100ml.
Statistical threshold value (STV): STV is a measure of variability of generic E. coli levels in your water source. In simple terms, it is the level where 90 percent of the samples (log values) are below the value. PSR requires an STV at or below 410 E. coli CFU/100ml
CFU (colony forming units) is the estimate of bacterial concentration in your water per 100 ml.
More information on the Produce Safety Rule and agricultural water can be found here: http://www.fda.gov/Food/GuidanceRegulation/FSMA/ucm334114.htm
*MICROBIAL WATER QUALITY PROFILE*
This feature allows you to determine your MWQP. The initial MWQP must be established with a minimum of 20 water samples that are representative of use and collected as close to harvest as possible over a period of at least 2 to a maximum of 4 years. Geometric mean (GM) and Statistical Threshold Value (STV) are calculated from these 20 samples (minimum). The GM and STV are your MWQP and should be compared to the microbial quality criteria provided in the Produce Safety Rule.
After the initial MWQP has been established, the GM and STV values must be updated annually based on a minimum of 5 new samples. "Rolling" GM and STV values are calculated by combining the old and new sample data. For example, for an MWQP established with 20 samples, five new samples would be combined with the most recent 15 samples from the previous MWQP to update the MWQP and confirm that the water is still being used appropriately.
*CURRENT WATER SAMPLING CONDITIONS*
This feature will evaluate current environmental conditions to determine the potential for microbial contamination in a water source. The probability of contamination is determined using environmental data, current weather conditions, and user data input which includes water quality parameters specific to the water source in question.
Novedades
Versión 1.3
Updated for the latest version of iOS.
Privacidad de la app
University of Arizona, que desarrolló esta app, indicó que entre las prácticas de privacidad de la app, pueden incluirse el manejo de datos que se describe a continuación. Para obtener detalles, consulta la política de privacidad del desarrollador.
No se recopilan datos
El desarrollador no recopila ningún dato en esta app.
Las prácticas de privacidad pueden variar; por ejemplo, según tu edad o las funciones que uses. Obtén detalles
Información
- Vendedor
- University of Arizona
- Tamaño
- 5.7 MB
- Categoría
- Utilidades
- Compatibilidad
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- iPhone
- Requiere iOS 15.4 o posterior.
- iPad
- Requiere iPadOS 15.4 o posterior.
- iPod touch
- Requiere iOS 15.4 o posterior.
- Mac
- Requiere macOS 12.3 o posterior y una Mac con el chip M1 de Apple o posterior.
- Apple Vision
- Requiere visionOS 1.0 o posterior.
- Idiomas
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Inglés
- Edad
- 4+
- Copyright
- ©2024, Arizona Board of Regents on behalf of the University of Arizona.
- Precio
- Gratis