Again ; How can i find maximum allowable limits of specific pollutents in air ?

Question

According to

WHO and OMAN .

Is there any recommended sites ??

the polltuents are :
1/ O3
2/ CO
3/ hydrocarbons
4/sulfur dioxide
5/ oxides of nitrogen
6/ lead
7/particulates

please give me the link

about hydrocarbons any 3 of them is enough

Answer 1

Have you tried OSHA?
It's tedious, but you will probably have better luck searching each pollutant separately.
You will get almost nowhere with hydrocarbons without being specific. There are too many.

Answer 2

It depends on where you are, and what allowable limits you are talking about.

The allowable limits coming out of your car are different in different places. Some states in the U.S. have limits and some do not.

For there to be an "allowable" limit you have to have somebody that is being "allowed", that is, somebody in an enforceable situation.

Air that is just sitting in your front yard does not have any allowable limits. Nobody is responsible for that air quality and noone has been "allowed" any pollutant level.

Regulated facilities (like many manufacturing sites) operate under permits from the regulating bodies that state their allowable emissions. These allowable emissions are different for different industries and for different sites and for different kinds of equipment.

There is no such thing as a general allowable limit in terms of enforcement. There are people who have calculated levels that pollutants should be kept at to protect health. There is not a lot of agreement on these levels.

In the U.S., If you pick a particular type of industry you can find some information about regulatory emission limits for certain pollutants at www.epa.gov.

Answer 3

The first link has the EPA national standards for all except the hydrocarbons. Those seem to be limited by emission standards, not air quality standards. Try a search of "hydrocarbon limits" at this link.

World Health Organization has different guidelines.

Answer 4

here may be a good place to start!
Would also like to point out that EVERY state has its own air polution laws, with the exception of Montana.
And that the US Gov., in the last 6 years, has DEMOLISHED every air polution law writen since 1970. So "www.epa.gov" would probly not be a reputable site for the info you desire.