Table 4 Baseline emission factors for regional power grid in China from 2006 to 2019 (Unit: kg CO2/kWh).

From: Greenhouse gas emissions from municipal wastewater treatment facilities in China from 2006 to 2019

Regions in China

2006

2007

2008

2009

2010

2011

2012

2013

2014

2015

2016

2017

2018

2019

North

0.983

1.030

0.993

0.894

0.870

0.811

0.798

0.804

0.800

0.760

0.725

0.713

0.708

0.712

Northeast

1.005

1.050

1.030

0.927

0.910

0.842

0.852

0.862

0.841

0.780

0.780

0.720

0.678

0.661

East

0.864

0.905

0.884

0.783

0.769

0.749

0.757

0.761

0.748

0.703

0.678

0.648

0.589

0.590

Central

0.944

0.975

0.997

0.853

0.771

0.724

0.734

0.738

0.723

0.651

0.615

0.606

0.571

0.572

Northwest

0.841

0.850

0.877

0.834

0.841

0.793

0.766

0.742

0.705

0.631

0.639

0.619

0.643

0.666

South

0.778

0.843

0.880

0.788

0.713

0.632

0.657

0.650

0.678

0.630

0.587

0.542

0.503

0.509

Hainan

0.846

0.836

0.829

0.773

0.765

0.632

0.657

0.650

0.678

0.630

0.587

0.542

0.503

0.509