South Florida Water Management District ambient pesticide monitoring network: 1992 to 2007

Abstract

The South Florida Water Management District has collected surface water and sediment samples for analysis of over 80 pesticides since 1992. Residues of atrazine and DDE-p,p(') are nearly ubiquitous throughout the sampling area. Surface water concentrations of atrazine at nine of 14 selected monitoring locations exhibited a downward trend and none of the detected concentrations exceeded established levels of concern. Seventy-five percent of the sampled locations had average sediment residues of DDE-p,p(') at levels that may impact sediment-dwelling organisms. Monitoring locations with the highest average DDE-p,p(') concentrations (based on detected values) and the highest percentage of pesticide detections did not exhibit consistent trends. Some locations exhibited increasing trends while trends at other locations showed a decrease in concentrations. Additionally, specific location concentrations for ethion, diazinon, and endosulfan documented periods of surface water quality exceedances. However, product label changes and grower education have substantially contributed to the reduced number of exceedances over time.

Endosulfan wet deposition in Southern Florida (USA)

“…The gate is typically closed thus flow and runoff from upstream areas are not common. Surface water samples were collected quarterly between 1992 and 2007 analyzed for suite of pesticides including α and β-endosulfan and endosulfan sulfate (Pfeuffer, 2011;Rand et al, 2010). Detection frequencies for α-endosulfan, 45%; β-endosulfan,33%; and endosulfan sulfate, 74%, were high and at times total endosulfan concentration exceeded both the acute, 0.22 ug L −1 and chronic, 0.056 ug L −1 , water quality thresholds established for protection of freshwater organisms (Rand et al, 2010).…”

“…1). Environmental monitoring within HAA over the past two decades has documented the presence of endosulfan residues in surface water, sediment, and biota (Fulton et al, 2004;Harman-Fetcho et al, 2005;Pfeuffer, 2011;U.S.EPA, 2010a). Data have indicated potential for adverse ecological impact to freshwater and marine ecosystems (Fulton et al, 2004;Rand et al, 2010;Scott et al, 2002).…”

Degradación de bromacil mediante la cepa IT-01 de Penicillium spp. y su aplicación en un biofiltro a escala laboratorio

“…Ante esto, el Servicio Nacional de Acueductos y Alcantarillados debió solventar la problemática llevando cisternas con agua potable al lugar afectado durante un tiempo indeterminado (Agüero, 2007), lo que implicó un alto costo para la institución. En otras partes del mundo, como Estados Unidos (Pfeuffer, 2011;Zhang et al, 1997), Holanda (Schipper & Vissers, 2008) y España (Hernández et al, 2008) también se han detectado trazas de este pesticida en aguas de potencial consumo humano.…”

Novel Analytical Methodologies for the Monitoring of Traditional and Non-traditional Pollutants in different Environmental Compartments of South Florida

“…agricultural purposes in Florida between 2007(FDACS, 2010, and is used in weed management by tropical fruit farms in southern Miami-Dade County (Mossler & Nesheim, 2011).…”

“…The SFWMD maintains a large pesticide monitoring program on these canals, and although glyphosate is the most used herbicide in Florida it is not included in that effort (Pfeuffer, 2011). Therefore, glyphosate and AMPA are potential candidates to be included in such monitoring programs, and a simple, sensitive analytical methodology would be a desirable tool to achieve this task in large regional efforts.…”