U.S. Environmental Protection Agency Valuation of Surface Water Quality Improvements

2012 ◽  
Vol 6 (1) ◽  
pp. 130-146 ◽  
Author(s):  
Charles Griffiths ◽  
Heather Klemick ◽  
Matt Massey ◽  
Chris Moore ◽  
Steve Newbold ◽  
...  
Keyword(s):  
Water Quality ◽  
Surface Water ◽  
Environmental Protection ◽  
Environmental Protection Agency ◽  
Surface Water Quality ◽  
Quality Improvements ◽  
Protection Agency

scholarly journals ANÁLISE DE RISCO DE CONTAMINAÇÃO DAS ÁGUAS SUBTERRÂNEAS E SUPERFICIAIS DA REGIÃO DE PETROLINA (PE) E JUAZEIRO (BA)

2001 ◽  
Vol 11 ◽  
Author(s):  
VERA L. FERRACINI ◽  
MARIA C. Y. P. PESSOA ◽  
ADERALDO S. SILVA ◽  
CLÁUDIO A. SPADOTTO
Keyword(s):  
Surface Water ◽  
Environmental Protection ◽  
San Francisco ◽  
Environmental Protection Agency ◽  
Water Contamination ◽  
Middle Portion ◽  
Protection Agency ◽  
Pesticide Degradation ◽  
Long Time ◽  
Degradation Time

Analisou-se o potencial de contaminação das águas subterrâneas e superficiais do Submédio do Rio São Francisco por pesticidas aplicados nas culturas de manga e uva, mediante critérios da Environmental Protection Agency, do índice de GUS e critérios propostos por GOSS. Todos os critérios utilizados levam em consideração as propriedades dos produtos aplicados, não demandando custos elevados nem muito tempo para o levantamento das informações e para a avaliação do potencial de contaminação. Os resultados obtidos reforçam a importância de disponibilizar informações sobre as propriedades físico-químicas dos pesticidas, principalmente o coeficiente de adsorção, cujo valor permite a previsão da mobilidade do composto no solo. Este fator, integrado ao conhecimento do tempo de degradação do produto até a metade de sua concentração inicial (meia-vida) no solo, fornece informações sobre a sua influência no potencial de contaminação das águas. Os resultados deste trabalho propiciam o conhecimento dos pesticidas com maior potencial de contaminação dos recursos hídricos, os quais devem ser priorizados no monitoramento ambiental “in loco”. GROUND AND SURFACE WATER OF THE REGIONS PETROLINA (PE) AND JUAZEIRO (BA) Abstract The contamination potential of ground water and surface water in the sub-middle portion of San Francisco river basin was analyzed for pesticides applied in mango and grape cultivation by following the criteria of Environmental Protection Agency and to the index of GUS and criteria proposed by GOSS. All the criteria used take into consideration the applied products properties, by not demanding high costs nor a long time for rising information and evaluating contamination potential. The results obtained reinforce the importance of information publication on the physicochemical properties of pesticides, especially data on adsorption coefficient, whose values allow to predict the pesticide mobility in soils. This factor combined with the pesticide degradation time to the half of its initial concentration (half life) in the soil, provides information on pesticide water contamination potential. The results of this work allow the identification of the pesticides with higher contamination potential to water resources, which should be prioritized in environmental monitoring “in loco”.

scholarly journals DISTRIBUSI LOGAM BERAT MANGAN (Mn) PADA AIR LAUT PERMUKAAN DI PERAIRAN TELUK STARING SULAWESI TENGGARA

2020 ◽  
Vol 5 (1) ◽  
pp. 89
Author(s):  
. Indra ◽  
Alrum Armid ◽  
Amadhan Takwir
Keyword(s):  
Water Quality ◽  
Environmental Protection ◽  
Environmental Protection Agency ◽  
Random Sampling ◽  
Quality Standard ◽  
Protection Agency ◽  
Water Quality Standard

Logam berat Mangan (Mn) termasuk logam esensial yang bersumber dari peristiwa pengikisan (erosi) Mn masuk kedalam lingkungan perairan akibat dari aktivitas manusia seperti buang limbah industri, pelayaran, pertanian dan buangan limbah rumah tangga. Penelitian ini bertujuan untuk mengidentifikasi sebaran spasial logam berat Mn di Perairan Teluk Staring. Jenis penelitian yang di lakukan adalah pengambilan sampel air laut di permukaan Teluk Staring sebanyak 12 Stasiun dengan metode Purposive Random Sampling. Larutan sampel dianalisis dengan Spektrofometri Serapan Atom (SSA). Analisis sebaran spasial menggunakan metode interpolasi IDW pada ArcGIS. Dari hasil pengukuran menunjukan kisaran kosentrasi kadar logam Mn di 12 Stasiun sebesar 0,1153 dan 0,4077 ppm. Nilai rata-rata logam Mn adalah antara 0, 2463 ppm. Kadar logam Mn yang tertinggi terdapat pada Stasiun 3 dan 4. Hasil analisis spasial dari 12 Stasiun menunjukan bahwa pada semua stasiun pengamatan telah  terkontaminasi oleh logam berat Mn, dengan konsentrasi melewati standar baku mutu yang telah ditentukan oleh ENVIRONMENTAL PROTECTION AGENCY, Water Quality Standard 1972. Dalam hal ini Teluk Staring telah tercemar oleh logam berat Mn. Sedangkan variabel lingkungan (Suhu,Salinitas dan pH) terhadap konsentrasi Logam Berat Mn tidak memiliki pengaruh yang signifikan.Kata kunci: Logam Berat Mangan (Mn), Distribusi Spasial, Teluk Staring

Evaluation of Microbiological Quality of Agricultural Water and Effect of Water Source and Holding Temperature on the Stability of Indicator Organisms' Levels by Seven U.S. Environmental Protection Agency–Approved Methods

2020 ◽  
Vol 83 (2) ◽  
pp. 249-255
Author(s):  
ACHYUT ADHIKARI ◽  
VIJAY SINGH CHHETRI ◽  
ANDREA CAMAS
Keyword(s):  
Surface Water ◽  
Environmental Protection ◽  
Environmental Protection Agency ◽  
Water Source ◽  
Indicator Organisms ◽  
Agricultural Water ◽  
Protection Agency ◽  
E Coli ◽  
Holding Temperature

ABSTRACT The Food Safety Modernization Act Produce Safety Rule requires covered produce growers to monitor the quality of their agricultural water on a regular basis by some U.S. Environmental Protection Agency (EPA)–approved methods recognized by the U.S. Food and Drug Administration. In this study, we evaluated the changes in the population of indicator organisms in surface water up to 6 months, and the effects of water source and holding temperature on the survival of indicator organisms by seven EPA-approved methods (five methods for Escherichia coli and two methods for Enterococcus). The levels of E. coli and Enterococcus in the surface water were variable with sampling month, ranging from 1.61 ± 0.04 to 2.68 ± 0.15 log most probable number (MPN)/100 mL and from undetectable level to 1.19 ± 0.29 log MPN/100 mL, respectively. At 25°C (holding temperature), there were significant reductions (P < 0.05) in E. coli and Enterococcus populations in surface water after 48 and 24 h, respectively, whereas at 4°C, no significant changes in the bacterial populations were observed up to 48 h. Methods 1603, 1604, 1103.1, 10029, and Colilert showed a comparable sensitivity in quantifying E. coli, whereas method 1600 and Enterolert showed a variable sensitivity with the type of water. The results indicated that regular monitoring of agricultural water is essential to examine whether the microbial quality of water is appropriate for its intended use. Water samples should be maintained at 4°C to minimize the changes in microbial populations between sampling and testing. The comparison of the sensitivity of EPA methods for quantifying indicator organisms could provide growers with useful information for choosing the method for their water quality analysis. HIGHLIGHTS

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