System | Criteria for usea | Applied removal efficiencies per type of technology | ||||||||||
Residential population density (pp/ha) | Status 2020b | COD (%) | BOD (%) | TN (%) | TP (%) | Coliforms (%) | ||||||
ST | AT/RR | ST | AT/RR | ST | AT/RR | ST | AT/RR | ST | AT/RR | |||
On-site | <100 | Rural/Urban | 40a | 45 | 15 | 5 | 90 | |||||
CBS | >100 | Rural | 80a | 85 | 15 | 5 | 99 | |||||
Medium Central | 100 - 250 | Urban | 80 | 88 | 85 | 97 | 15 | 90 | 5 | 67 | 99 | 99.9 |
Central | >250 | Urban | 88 | 97 | 73 | 29 | 99.9 |