2025 Carbon Baseline

Document Information

Field	Value
Document Reference	CARB_BASELINE_2025
Issue Number	1
Issue Date	12 May 2026
Next Review	12 May 2027 (annually thereafter)
Controlled By	Sean Ashton (HSQE Consultant)
Approved By	Aaron Mason, Managing Director

Master source — this page is canonical

The IMS portal is the master source for the 2025 Carbon Baseline. The Excel below is a downloadable snapshot containing the full activity-data table, emission-factor list, calculation workbook, scope summary and methodology notes.

Download as Excel

Related: APP_06 Aspects & Impacts · APP_11 HSQE Objectives & KPIs · Sustainability Note 2025 · B2.11 Carbon Management

Tip: use the floating button bottom-right to toggle wide-mode (Alt+W).

Headline

	2025
Total Scope 1 + 2 emissions	288.7 tCO₂e
Scope 1 (direct fuel & heating)	288.0 tCO₂e (99.75%)
Scope 2 (purchased electricity, location-based)	0.7 tCO₂e (0.25%)

This is AMWS's first measured carbon footprint. No prior-year comparison exists; year-on-year tracking starts at CY2026 reporting.

Why we measure this way

Per simplified APP_11 E3 (May 2026), AMWS's environmental objective is to measure and report the annual carbon footprint (Scope 1 + 2), identify reduction opportunities, and align with our primary water-company customers' supply-chain net-zero programmes. The previous "5% annual reduction + net-zero by 2040" wording was retired because it set a percentage target against a baseline that didn't yet exist and a long-term claim AMWS had no credible route to deliver. The position now is honest, measurable and audit-defensible (B2.11.1).

1. Reporting boundary

• Approach: Operational control (GHG Protocol Corporate Standard, Revised Edition).
• Period: 1 January 2025 – 31 December 2025.
• Entities included: A M Water Services Ltd — Northampton HQ (Unit 2C Stour Road) and the full fleet operated under AMWS control (grab lorries, vans, light vehicles, yard plant).
• Scopes: Scope 1 + Scope 2 (location-based). Scope 3 categories are excluded in year 1 — see §6.

2. Activity data (2025 totals)

Source: Leanne Mason (Director — Finance & Admin), 7 May 2026, from fuel-card statements and HQ utility bills.

#	Source	Scope	Quantity	Unit	Data quality
1	Diesel — fleet (grab lorries, vans)	1	111,878.06	litres	High — fuel-card transactional record
2	Petrol — fleet (light vehicles)	1	3,292.39	litres	High — fuel-card transactional record
3	2-stroke / specialist fuel — yard plant	1	1.18	litres	Low — yard estimate; de minimis (<0.001% of footprint)
4	Natural gas — office heating (HQ)	1	1,405	kWh	High — utility bills
5	Electricity — office (HQ)	2	3,442	kWh	High — utility bills

3. Emission factors

UK Government 2024 GHG Conversion Factors (DESNZ, June 2024 release). This is the standard set used by UK SMEs for company reporting and accepted by both Anglian Water and Severn Trent on supply-chain returns.

Activity	Factor (kgCO₂e per unit)	Notes
Diesel (average biofuel blend) — combustion	2.5106 / L	Scope 1 direct
Petrol (average biofuel blend) — combustion	2.0846 / L	Scope 1 direct
2-stroke / petrol mix	2.0846 / L	Approximated to petrol average
Natural gas (gross CV)	0.18293 / kWh	Scope 1 direct
UK grid electricity — generation	0.20705 / kWh	Scope 2 location-based

4. Results

Source	Scope	Activity × Factor	tCO₂e	% of total
Diesel — fleet	1	111,878.06 L × 2.5106	280.88	97.3%
Petrol — fleet	1	3,292.39 L × 2.0846	6.86	2.4%
Natural gas — heating	1	1,405 kWh × 0.18293	0.26	0.1%
2-stroke — yard plant	1	1.18 L × 2.0846	0.00	<0.01%
Electricity — HQ	2	3,442 kWh × 0.20705	0.71	0.25%
Total Scope 1			288.00	99.75%
Total Scope 2			0.71	0.25%
Total Scope 1 + 2			288.72	100%

Diesel is 97% of the footprint. Any meaningful reduction strategy at AMWS is, first and last, a fleet-fuel strategy.

5. What this means

• Anglian Water and Severn Trent can be sent this baseline (or the matched supply-chain template populated from it) when their PR24 supply-chain returns are next requested.
• The auditor (Achilles UVDB B2.11.1) can be shown: this page + the Excel + APP_11 E3 + APP_06 Aspects 1 & 9 + Sustainability Note 2025. The evidence chain runs from policy → register → measurement.
• For 2026 reporting (drafted Q2 2027), the comparison year-on-year is automatic — same workbook, refresh the activity-data column.

6. Exclusions (Scope 3, year 1)

The following are deliberately out of scope for the 2025 baseline:

• Employee commuting (no survey carried out in 2025 — flagged for 2026 staff briefing).
• Mileage reclaimed via personal-vehicle expenses (volume believed de minimis — to confirm at 2026 review).
• Embodied emissions in materials (pipes, fittings, aggregates) — Anglian / Severn Trent capture these under their own PR24 Scope 3 returns; AMWS does not duplicate-count.
• Subcontract labour-supply operatives' fuel use (reportable by the supplying entity, not AMWS).
• Wastewater treatment downstream emissions (outside operational control).

7. Caveats

• First baseline year — no prior-year comparator. Year-on-year tracking starts CY2026.
• No intensity metric in year 1 (per-FTE or per-£turnover). Added at year 2 once headcount and turnover for the comparison year are confirmed.
• No fixed reduction target is set against this baseline. Per APP_11 E3, targets follow once levers are identified (telematics-driven idling, route optimisation, vehicle-replacement cycle, biofuel availability for HGVs).
• 2-stroke is a yard estimate, not a metered total. Contribution to the footprint is negligible so further refinement is not material.

8. Year-2 improvement plan (CY2026 reporting)

1. Add an intensity metric: tCO₂e per FTE and tCO₂e per £100k turnover.
2. Capture Scope 3 employee commuting via a short staff survey at the 2026 management briefing.
3. Split the diesel line into grab-lorry vs light-fleet to enable telematics-driven idling / efficiency targets.
4. Cross-reference 2026 figures to the matched Anglian / Severn Trent supply-chain reporting template (when issued).
5. Identify ≥3 reduction opportunities per the APP_11 E3 measurable criterion.

9. Sign-off

• Drafted by: Sean Ashton, HSQE Consultant (Onyx Operations) — 12 May 2026.
• Approved by: Aaron Mason, Managing Director — recorded at the standing weekly Director / HSQE call.
• Held in: the IMS portal (this page, master) and the Achilles 'June 2026 Audit' evidence pack, folder 10 Environmental.

10. Cross-references

• APP_06 — Aspects & Impacts Register — Aspect 1 (Vehicle/plant emissions) and Aspect 9 (Energy use)
• APP_11 — HSQE Objectives & KPIs — E3 (carbon footprint measurement)
• Sustainability Note 2025 — narrative companion (waste, fleet, community, PR24 alignment)
• B2.11 Carbon Management — auditor evidence mapping
• POL_HSQE_10 — Environmental Policy
• Recycling Initiatives

Audit trail

Date	Action	By	Details
04/05/2026	Data request issued	Sean Ashton, HSQE Consultant	Five 2025 totals requested from Leanne Mason (diesel, petrol, 2-stroke, office electricity, office heating).
07/05/2026	Activity data received	Leanne Mason, Director — Finance & Admin	Totals returned by email: 111,878.06 L diesel · 3,292.39 L petrol · 1.18 L 2-stroke · 3,442 kWh electricity · 1,405 kWh gas.
12/05/2026	Baseline calculated and published	Sean Ashton, HSQE Consultant	Issue 1. UK Gov 2024 GHG Conversion Factors applied. Scope 1 = 288.0 tCO₂e, Scope 2 = 0.7 tCO₂e, total = 288.7 tCO₂e. Diesel = 97% of footprint.

How this document is approved

This document is maintained under AMWS's continuous-compliance model. Substantive revisions are reviewed and signed off by the Directors at the standing weekly Director / HSQE compliance call (Sean Ashton, Onyx + Leanne Mason). Currency, cross-references and minor edits are checked at the monthly Onyx site visit. The annual Management Review (September) provides the strategic-level confirmation. Compliance is therefore continuous, not gated on a single annual meeting.

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