HUITTISTEN PUHDISTAMO OY front page Company frequently asked Contact information For more efficient wastewater treatment Huittisten Puhdistamo Oy is owned by the cities of Huittinen and Sastamala and the municipality of Punkalaitumen. The company is responsible for supra-regional wastewater treatment and manages the construction sewers under construction. The company will offer its owners a high-quality wastewater treatment service. Bulletin board Huittinen | Punkalaidun | Sastamala