DDT contamination in Cameron Highlands was reported many times since 2012. May be before. It was highlighted in the main local news papers. BUT who cares. Thats why I suggested to have center for research and monitoring for highlands ecosystem/ecology.

http://www.thestar.com.my/story/?file=%2F2012%2F12%2F12%2Fnation%2F20121212065450&sec=nation

CAMERON HIGHLANDS: Two toxic and illegal pesticides known to cause serious health problems to humans are poisoning Cameron Highland's major rivers.  Banned pesticides DDT (dichlorodiphenyltrichloroethane) and lindane (gamma hexachlorocyclohexane or HCH) in Sungai Bertam and Sungai Telom. The United States' Environmental Protection Agency (EPA) had classified the pesticides as a probable human carcinogen.

Both DDT and lindane have been completely banned in Malaysia. They are among the list of toxic chemicals identified in the Stockholm Convention of Persistent Organic Pollutants (POPs) which Malaysia signed in 2002 but has yet to be ratified.

http://www.thestar.com.my/Opinion/Letters/2013/02/01/Banned-but-still-in-use/

Lindane and DDT are suspected to be in use in the farms and plantations of Cameron Higlands. The use of lindane was discontinued after January 2000. Therefore, the use of lindane and DDT is illegal.

Lindane and DDT, which are known as persistently organic pollutants (POPs), are organic compounds that have long half-lives in the environment and undergo slow physical, chemical, and biological degradation.