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

2

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

3

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

4

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

5

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

6

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

7

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

8

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

9

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

10