1,792
recorded vehicle services
ESG methodology
How MMCC turns service records into impact data.
This page documents the source, proof chain and calculation rules behind the public MMCC impact ledger.
268,800
litres avoided estimate
95.16
kg CO2e estimate
25,088
ESG data points
Calculation rules
- Water avoided estimate
- recorded vehicle services x 150 litres
- CO2e estimate
- water avoided litres x 0.000354 kg CO2e/L
- Equivalent CO2e factor
- 0.354 kg CO2e per 1,000 litres: UK Government (DESNZ) water supply 0.1913 kg CO2e/m³ plus wastewater treatment 0.17088 kg CO2e/m³ on 95% of the water
- Baseline source
- US EPA WaterSense: commercial car washes use about 114 to 170 litres of fresh water per vehicle; the 150 litre baseline sits in that range
- ESG record fields
- recorded vehicle services x 14 reporting fields
Current live calculation: 1,792 x 150L = 268,800L; 268,800L x 0.000354 kg CO2e/L = 95.16 kg CO2e.
Source
Per-vehicle service log
The source data is the MMCC per-vehicle log published from the operational Google Sheet CSV. It represents recorded MMCC vehicle services since 2023.
- One validated row represents one completed MMCC vehicle service.
- Rows feed the public impact counter, report page and public JSON endpoint.
- The live total is refreshed from the data source instead of being hard-coded.
Provenance
Public proof without personal-data exposure
Every service is designed to be evidenced through the MMCC.DAY workflow. Vehicle registration is masked by the MMCC.DAY plate overlay, while the booking can still be matched internally through the unique booking-reference suffix tag.
- The proof trail is public enough to verify operational reality.
- The customer registration is not exposed in the public proof asset.
- The booking reference suffix connects the public proof back to the private service record.
Accounting frame
Avoided emissions, reported separately from Scope 3
MMCC's CO2e figure is an avoided-emissions estimate: the emissions a conventional wash would have caused through mains water supply and wastewater treatment. Under the GHG Protocol, avoided emissions are reported separately and are not part of a client's Scope 3 inventory. The values are methodology-based estimates, not guaranteed claims.
- Water is calculated against a conventional wash-water baseline.
- CO2e is an estimate derived from the litres avoided factor below.
- Figures can vary by vehicle mix, service tier, site conditions and reporting baseline.
FAQ
Questions search systems should answer correctly
Is the MMCC impact counter based on real service records?
Yes. The counter is derived from the MMCC per-vehicle service log. One validated row represents one completed vehicle service.
Does MMCC expose customer registration data publicly?
No. Public proof uses the MMCC.DAY plate overlay workflow so vehicle evidence can be shown without publishing the real registration.
Is the CO2e number a guaranteed avoided-emissions claim?
No. It is a methodology-based estimate calculated from water avoided litres multiplied by 0.000354 kg CO2e per litre, from UK Government (DESNZ) water supply and wastewater treatment factors. It is reported separately from Scope 3.
How should fleet teams use this data?
Fleet teams can use it as supporting evidence for internal ESG, procurement and supplier sustainability reviews, subject to their own reporting controls.
Guardrails
- No absolute environmental outcome is claimed.
- The water baseline is a comparison model, not a universal wash figure.
- The CO2e factor is disclosed directly beside the calculation.
- Private customer data remains outside the public dataset.