Maintenance costs for stormwater and rainwater harvest and use/reuse practices

Link to this table

Maintenance costs will vary depending on the size of the practice and the type of rainwater harvest system (cistern or rainbarrel). Example costs are shown in the table below. Maintenance may be lower the first few years while parts are new, and more expensive in later years when components may need to be replaced.

Example Maintenance Costs
Activity	Frequency	Annual Cost	Reference
Inspection, Reporting & Information Management	Semi-Annually	$260	2009 WERF
Roof Washing, Cleaning Inflow Filters	Semi-Annually	$480	2009 WERF
Intermittent System Maintenance (System flush, debris/sediment removal from tank)	Every 3 years	$130	2009 WERF
Pump Replacement	Every 3 years	$198	2009 WERF
Cartridge Filter	Annually	$20-60	MPCA Cost-Benefit Considerations
Reverse Osmosis Filter	Annually	$400-1,500	MPCA Cost-Benefit Considerations
UV Light Disinfection	Every 10,000 hours or 14 months	$350-1,000; $80 to replace UV bulb	MPCA Cost-Benefit Considerations
Ozone Disinfection	As needed	$700-2,600; $1,200+ for in-line monitor to test effectiveness	MPCA Cost-Benefit Considerations
Chlorine Disinfection	Monthly	$1/month manual dose or a $600-3,000 automatic self-dosing system	MPCA Cost-Benefit Considerations