Srilankan standard Institute is recommending 0.2 mg/l as a maximum allowable limit for Oil and Grease contamination (petroleum product) in Drinking water (SLS 614, 2013). But in 2014, Ministry of health gazetted a standard for Bottled water and they recommending 2.0mg/l as a maximum permissible limit.
Which is the Health based standard?
Dear Sir,
Please see the below given link for your appropriate question.
file:///C:/Users/DELL/Downloads/spec.pdf
http://bis.org.in/sf/fad/FAD25(2047)C.pdf
Regards
Krishna
Oil and Grease are very sensitive parameters in drinking water.Their presence even in ppb level may cause for serious health hazards.
Most countries don't have limits for "oil and grease"; instead limits are set for individual organic compounds present in drinking water as toxicity varies considerably from one compound to another. Besides, 0.2 mg/L of "oil and grease" should be above the permissible limit for drinking water; bottled water should have more stringent limits and not higher.
I completely agree with Abba Baalbaki. You can see what parameters are regulated in drinking water in the European Union:
http://eur-lex.europa.eu/LexUriServ/LexUriServ.do?uri=OJ:L:1998:330:0032:0054:EN:PDF
Oil and grease is not mentioned in the EU Directive. Commonly it is supposed that drinking water is free of oil and grease. Concentration of oil and grease recommended by the Srilankan Standard Institute 0.2 mg.L-1 is very high. 2.0 mg.L-1 of oil and grease for bottled water is according to my opinion not acceptable. Such water smells and cannot be used by humans.
Regards Vit
I need more scientific proves to discuss those with the relevant regularizing body. because the oil and grease parameter also not clearly defined.
I also agreed these both Standards are not the health based standards.
I completely agree with Abba Baalbaki and Mateju You can see what parameters are regulated in drinking water in the European Union:
http://eur-lex.europa.eu/LexUriServ/LexUriServ.do?uri=OJ:L:1998:330:0032:0054:EN:PDF
Oil and grease is not mentioned in the EU Directive. Commonly it is supposed that drinking water is free of oil and grease. Concentration of oil and grease recommended by the Srilankan Standard Institute 0.2 mg.L-1 is very high. 2.0 mg.L-1 of oil and grease for bottled water is according to my opinion not acceptable. Such water smells and cannot be used by humans.
According to the Indian drinking water standards (IS 10500:2012-2nd revision), the permissible limit of mineral oil in drinking water is 0.5mg/L. So the limit restricting the oil & grease content in drinking water to 0.2mg/L sounds very good and it should be around that limit. But if a bottle of one-liter water contains 2mg of oil and grease, it will definitely make the water tasteless and bad odor will appear after chlorination.
Oil and grease- contents are not acceptable. Its content is to at zero ppm level. As these are floaters and would be the first to come when decanted.. unless the water is sourced below surface on dip tube etc... Also there are possibilities of miscibility with water which could pose major problems.. Even for sampling and testing O&G contents, special procedures are followed..and caution exercized.. w wshs..
Using solvent extraction by weight method, Fat, Oil & Grease (i.e. FOG) should not be more than 5.0 mg/l depending on the usage of the receiving water. The maximum allowable conventional limit should not exceed 15.0 mg/l
Oil and Grease parameters are generally set for waste water effluent or as a pollutant, not for drinking water. The limit is set so that Waste Water Treatment Plants can efficiently handle incoming influent from multiple sources and not get overwhelmed and cause issues in the treatment process. Also oil and grease limits are set to be part of a permitting process to limit the amount going into a stream, river, ground water etc. from a hazardous waste site or some type of a process.
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