Terra is guided by U.K. Water Research Centre (WRc) standards with over 90 years of research knowledge and European standards which include but not limited to:-
- Manual of Sewer Condition Classification 4th & 5th Edition (2014).
- Sewer For Adoption – 7th Edition.
- Sewerage Risk Management 2015.
- Sewer Jetting Code of Practice – 2nd Edition.
- EN 752: 2008.
- EN 13508.