Activists and lawyers are held on public order charges ahead of Tiananmen crackdown anniversary.
Authorities in eastern China cut off supply to 680,000 people after 'abnormalities' are found in water from the Yangtze River.
Analysts say even communists are a threat to stability if they are too vocal.
Gao Yu's criminal detention comes amid a broader crackdown ahead of a sensitive political anniversary.
The sentence is thought to be linked to his publication of a critical book about the Chinese president.
China says it was the target of 10 'terrorist incidents' in the past year.
Six people are taken to the hospital for treatment following the attacks, but no fatalities are reported.
Pu Zhiqiang is being held under criminal detention.
Hangzhou residents say their scenic mountainous region is better suited to eco-tourism than waste disposal.
The transportation network and popular tourist sites groan under the burden of a nationwide travel boom.
Beijing seeks to curb the growth of Protestant congregations, analysts say.
Restrictions on local and foreign press also weigh down the ranking.
Some welcome mainland business, while others call on shoppers to stay on their side of the border.