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The Safe Drinking Water Act (SDWA)

Decent Essays

The Safe Drinking Water Act (SDWA) define the (MCLG) as a minimum level of a contaminant or pollutant concentration in the drinking water below which there is no harmful effect or expected risk to human health. Also, (MCLG) is non-enforceable public health goal. As for (MCL) is the maximum level of a contaminant or pollutant concentration that is permissible in the drinking water. Also, (MCL) is enforceable standard that is set as close to the (MCLG) as possible, by using the best available treatment technology (to ensure control of a contaminant) and taking cost into the consideration. It is good to know, that the contaminant concentration will contain all inorganic substance, organic substance, and microorganism.

2. What is the difference …show more content…

However, the granting of a variance will not result in an unreasonable risk to the health of persons served by the system except the microbial contaminants. Therefore, the variances will cut the cost of installing the best available technology for water treatment instead affordable treatment system will be installed any public water system. I think of the variance as a tool used by regulator for any small public system to minimize the cost of the treatment technique (affordable BAT) with more choices to be considered as long as it is approved by the state and (EPA). As for the exemption is intended to grant more time for any water system to meet or comply with the National Primary Drinking Water Regulation (NPDWR) requirements regarding the (MCL) without resulting in unreasonable risk to the health. I think of the exemption as a complementary of the variance (by giving more time instead of specific time). However, both of them are critical decision to be taken by the state, as it related to human health. Thus, I do believe monitoring program is required with parodic visit and sample testing with long health observation for all community that is served by the water …show more content…

Also, the process of TMDL will assign the necessary reductions or limit the discharge of one or more of the pollutant sources without causing any violation of the water quality standards (to keep aquatic life, drinking water, and fish protected). A “TMDL” functions as a “pollution budget” and potential starting point for restoration or protection activities with the target goal of achieving or maintaining water quality standards. Under section 303(d) of the (CWA), the law requires that the states establish, priority rankings for waters on the lists and develop “TMDL” for these waters. 6. How are TMDLs determined? How are they monitored?
By applying the equation below in an approved state plan by the EPA; that stat
“TMDL” = Point Sources + Nonpoint Sources + Projected Growth + Margin of Safety.
All load contribution are determined throughout the review of the monitoring data and watershed modeling. The tools used to review the data depends upon documents preparation that consist of; description of the impairment, identification of the impairment causes, the end point and quantitative goal setting. Also, most critical key components is pollutant sources identification with full methodology description. In addition to, allowable load, allocation determination with margin of safety

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