Fosse septique

When we bought our present house 3 months ago we had to agree to pay and instal a fosse septique which luckily was partly being funded by the commune. We pay half. We heard somewhere! one can apply for an interest free loan and wondered if anyone else knows anything about this please. Also if they do is it means tested?

See the post "Sewage treatment systems any info" last replied to in the last 24 hours.