Exhibit 99.1

Joint Filer Information

Name of Joint Filer:	Advent International GPE VIII-B-1 Limited Partnership

Address of Joint Filer:	c/o Advent International Corporation 800 Boylston Street Boston, MA 02199

Relationship of Joint Filer to Issuer:	10% Owner

Issuer Name and Ticker or Trading Symbol:	AquaVenture Holdings Limited [WAAS]

Date of Event Requiring Statement:	December 23, 2019

Designated Filer:	Advent International Corporation

ADVENT INTERNATIONAL GPE VIII-B-1 LIMITED PARTNERSHIP

By: GPE VIII GP S.À R.L., GENERAL PARTNER

By: ADVENT INTERNATIONAL GPE VIII, LLC, MANAGER

/s/ Justin Nuccio
Justin Nuccio, Manager

By: ADVENT INTERNATIONAL CORPORATION, MANAGER

/s/ James Westra
Name:	James Westra
Title:	General Counsel and Managing Partner
Date:	February 5, 2020

Joint Filer Information

Name of Joint Filer:	Advent International GPE VIII-B-2 Limited Partnership

Address of Joint Filer:	c/o Advent International Corporation 800 Boylston Street Boston, MA 02199

Relationship of Joint Filer to Issuer:	10% Owner

Issuer Name and Ticker or Trading Symbol:	AquaVenture Holdings Limited [WAAS]

Date of Event Requiring Statement:	December 23, 2019

Designated Filer:	Advent International Corporation

ADVENT INTERNATIONAL GPE VIII-B-2 LIMITED PARTNERSHIP

By: GPE VIII GP S.À R.L., GENERAL PARTNER

By: ADVENT INTERNATIONAL GPE VIII, LLC, MANAGER

/s/ Justin Nuccio
Justin Nuccio, Manager

By: ADVENT INTERNATIONAL CORPORATION, MANAGER

/s/ James Westra
Name:	James Westra
Title:	General Counsel and Managing Partner
Date:	February 5, 2020

Joint Filer Information

Name of Joint Filer:	Advent International GPE VIII-B-3 Limited Partnership

Address of Joint Filer:	c/o Advent International Corporation 800 Boylston Street Boston, MA 02199

Relationship of Joint Filer to Issuer:	10% Owner

Issuer Name and Ticker or Trading Symbol:	AquaVenture Holdings Limited [WAAS]

Date of Event Requiring Statement:	December 23, 2019

Designated Filer:	Advent International Corporation

ADVENT INTERNATIONAL GPE VIII-B-3 LIMITED PARTNERSHIP

By: GPE VIII GP S.À R.L., GENERAL PARTNER

By: ADVENT INTERNATIONAL GPE VIII, LLC, MANAGER

/s/ Justin Nuccio
Justin Nuccio, Manager

By: ADVENT INTERNATIONAL CORPORATION, MANAGER

/s/ James Westra
Name:	James Westra
Title:	General Counsel and Managing Partner
Date:	February 5, 2020

Joint Filer Information

Name of Joint Filer:	Advent International GPE VIII-B Limited Partnership

Address of Joint Filer:	c/o Advent International Corporation 800 Boylston Street Boston, MA 02199

Relationship of Joint Filer to Issuer:	10% Owner

Issuer Name and Ticker or Trading Symbol:	AquaVenture Holdings Limited [WAAS]

Date of Event Requiring Statement:	December 23, 2019

Designated Filer:	Advent International Corporation

ADVENT INTERNATIONAL GPE VIII-B LIMITED PARTNERSHIP

By: GPE VIII GP S.À R.L., GENERAL PARTNER

By: ADVENT INTERNATIONAL GPE VIII, LLC, MANAGER

/s/ Justin Nuccio
Justin Nuccio, Manager

By: ADVENT INTERNATIONAL CORPORATION, MANAGER

/s/ James Westra
Name:	James Westra
Title:	General Counsel and Managing Partner
Date:	February 5, 2020

Joint Filer Information

Name of Joint Filer:	Advent International GPE VIII-C Limited Partnership

Address of Joint Filer:	c/o Advent International Corporation 800 Boylston Street Boston, MA 02199

Relationship of Joint Filer to Issuer:	10% Owner

Issuer Name and Ticker or Trading Symbol:	AquaVenture Holdings Limited [WAAS]

Date of Event Requiring Statement:	December 23, 2019

Designated Filer:	Advent International Corporation

ADVENT INTERNATIONAL GPE VIII-C LIMITED PARTNERSHIP

By: GPE VIII GP S.À R.L., GENERAL PARTNER

By: ADVENT INTERNATIONAL GPE VIII, LLC, MANAGER

/s/ Justin Nuccio
Justin Nuccio, Manager

By: ADVENT INTERNATIONAL CORPORATION, MANAGER

/s/ James Westra
Name:	James Westra
Title:	General Counsel and Managing Partner
Date:	February 5, 2020

Joint Filer Information

Name of Joint Filer:	Advent International GPE VIII-D Limited Partnership

Address of Joint Filer:	c/o Advent International Corporation 800 Boylston Street Boston, MA 02199

Relationship of Joint Filer to Issuer:	10% Owner

Issuer Name and Ticker or Trading Symbol:	AquaVenture Holdings Limited [WAAS]

Date of Event Requiring Statement:	December 23, 2019

Designated Filer:	Advent International Corporation

ADVENT INTERNATIONAL GPE VIII-D LIMITED PARTNERSHIP

By: GPE VIII GP S.À R.L., GENERAL PARTNER

By: ADVENT INTERNATIONAL GPE VIII, LLC, MANAGER

/s/ Justin Nuccio
Justin Nuccio, Manager

By: ADVENT INTERNATIONAL CORPORATION, MANAGER

/s/ James Westra
Name:	James Westra
Title:	General Counsel and Managing Partner
Date:	February 5, 2020

Joint Filer Information

Name of Joint Filer:	Advent International GPE VIII-F Limited Partnership

Address of Joint Filer:	c/o Advent International Corporation 800 Boylston Street Boston, MA 02199

Relationship of Joint Filer to Issuer:	10% Owner

Issuer Name and Ticker or Trading Symbol:	AquaVenture Holdings Limited [WAAS]

Date of Event Requiring Statement:	December 23, 2019

Designated Filer:	Advent International Corporation

ADVENT INTERNATIONAL GPE VIII-F LIMITED PARTNERSHIP

By: GPE VIII GP S.À R.L., GENERAL PARTNER

By: ADVENT INTERNATIONAL GPE VIII, LLC, MANAGER

/s/ Justin Nuccio
Justin Nuccio, Manager

By: ADVENT INTERNATIONAL CORPORATION, MANAGER

/s/ James Westra
Name:	James Westra
Title:	General Counsel and Managing Partner
Date:	February 5, 2020

Joint Filer Information

Name of Joint Filer:	Advent International GPE VIII-H Limited Partnership

Address of Joint Filer:	c/o Advent International Corporation 800 Boylston Street Boston, MA 02199

Relationship of Joint Filer to Issuer:	10% Owner

Issuer Name and Ticker or Trading Symbol:	AquaVenture Holdings Limited [WAAS]

Date of Event Requiring Statement:	December 23, 2019

Designated Filer:	Advent International Corporation

ADVENT INTERNATIONAL GPE VIII-H LIMITED PARTNERSHIP

By: GPE VIII GP S.À R.L., GENERAL PARTNER

By: ADVENT INTERNATIONAL GPE VIII, LLC, MANAGER

/s/ Justin Nuccio
Justin Nuccio, Manager

By: ADVENT INTERNATIONAL CORPORATION, MANAGER

/s/ James Westra
Name:	James Westra
Title:	General Counsel and Managing Partner
Date:	February 5, 2020

Joint Filer Information

Name of Joint Filer:	Advent International GPE VIII-I Limited Partnership

Address of Joint Filer:	c/o Advent International Corporation 800 Boylston Street Boston, MA 02199

Relationship of Joint Filer to Issuer:	10% Owner

Issuer Name and Ticker or Trading Symbol:	AquaVenture Holdings Limited [WAAS]

Date of Event Requiring Statement:	December 23, 2019

Designated Filer:	Advent International Corporation

ADVENT INTERNATIONAL GPE VIII-I LIMITED PARTNERSHIP

By: GPE VIII GP S.À R.L., GENERAL PARTNER

By: ADVENT INTERNATIONAL GPE VIII, LLC, MANAGER

/s/ Justin Nuccio
Justin Nuccio, Manager

By: ADVENT INTERNATIONAL CORPORATION, MANAGER

/s/ James Westra
Name:	James Westra
Title:	General Counsel and Managing Partner
Date:	February 5, 2020

Joint Filer Information

Name of Joint Filer:	Advent International GPE VIII-J Limited Partnership

Address of Joint Filer:	c/o Advent International Corporation 800 Boylston Street Boston, MA 02199

Relationship of Joint Filer to Issuer:	10% Owner

Issuer Name and Ticker or Trading Symbol:	AquaVenture Holdings Limited [WAAS]

Date of Event Requiring Statement:	December 23, 2019

Designated Filer:	Advent International Corporation

ADVENT INTERNATIONAL GPE VIII-J LIMITED PARTNERSHIP

By: GPE VIII GP S.À R.L., GENERAL PARTNER

By: ADVENT INTERNATIONAL GPE VIII, LLC, MANAGER

/s/ Justin Nuccio
Justin Nuccio, Manager

By: ADVENT INTERNATIONAL CORPORATION, MANAGER

/s/ James Westra
Name:	James Westra
Title:	General Counsel and Managing Partner
Date:	February 5, 2020

Advent International GPE VIII-B-1 Limited Partnership 3/A