The most serious cases were airlifted to the capital, Tallinn
The first cases began appearing in the seaside resort of Parnu on 9 September, but a second wave hit the neighbouring county of Laane three days later.
Nearly 70 people have been treated and released from hospital.
Police have detained 12 suspects who face charges of unintentional homicide, and a possible three-year jail term.
One is suspected of selling 10 200-litre containers of the lethal drink to illicit alcohol peddlers.
One victim, a sawmill worker called Juri now recovering in a Parnu hospital, said he began suffering poisoning symptoms only hours after drinking the hooch.
"By mid-day there was nothing wrong, but by the evening I started seeing blue rings. And that was it," he said.
Estonia's average monthly wage is the equivalent of just $329, which makes cheap illegal alcohol sold in re-filled plastic drinks bottles an attractive option.
Disgrace
Juri said he had often bought illicit vodka in the past to save money, but after nine deaths in his village alone he vowed he would not do so again.
Last year almost one in five Estonian adults bought illegally distilled alcohol, according to Estonia's Market Research Institute.
In doing so, they spent the equivalent of $9.6m, depriving state coffers of valuable tax revenue.
According to other estimates, illegal alcohol accounts for between 40% and 60% of all alcohol sales in Estonia, a country likely to gain EU membership in 2004.
The Estonian President, Lennart Meri, has called the mass poisoning a national disgrace.
"This is the legacy of the Soviet-era way of living and our shame," he said.
Consumption of bootleg alcohol is most common in the countryside, where there is widespread poverty and unemployment.
"We have met these kinds of poisonings before, but not on this scale," said Urmas Sule, head doctor at Parnu Hospital.