Limited investment rate can become a health risk
The sewer network is part of our infrastructure, but it often goes unrecognised in discussion, unlike the roads and rail services. Cities are expanding, and today’s systems are often undersized, having been designed to cope with the requirements of a hundred years ago, or more! Insufficient state funding means low investment rates, resulting in potential problems for future generations. Some European countries have an average renewal rate of about 300 years, but there are also cities with much more than that.
That is why we strive to develop sewer systems with a lifetime of at least 100 years.