Exhibit 99.1

Joint Filer Information

Name of Joint Filer:	GPE VIII GP S.à r.l.
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

GPE VIII GP S.À R.L.
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:	January 2, 2020

Joint Filer Information

Name of Joint Filer:	Advent Partners GPE VIII-A 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 PARTNERS GPE VIII-A LIMITED PARTNERSHIP
By: AP GPE VIII GP LIMITED PARTNERSHIP, GENERAL PARTNER
By: ADVENT INTERNATIONAL GPE VIII, LLC, GENERAL PARTNER
By: ADVENT INTERNATIONAL CORPORATION, MANAGER
/s/ James Westra
Name:	James Westra
Title:	General Counsel and Managing Partner
Date:	January 2, 2020

2

Joint Filer Information

Name of Joint Filer:	Advent Partners GPE VIII-B Cayman 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 PARTNERS GPE VIII-B CAYMAN LIMITED PARTNERSHIP
By: AP GPE VIII GP LIMITED PARTNERSHIP, GENERAL PARTNER
By: ADVENT INTERNATIONAL GPE VIII, LLC, GENERAL PARTNER
By: ADVENT INTERNATIONAL CORPORATION, MANAGER
/s/ James Westra
Name:	James Westra
Title:	General Counsel and Managing Partner
Date:	January 2, 2020

3

Joint Filer Information

Name of Joint Filer:	Advent Partners GPE VIII Cayman 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 PARTNERS GPE VIII CAYMAN LIMITED PARTNERSHIP
By: AP GPE VIII GP LIMITED PARTNERSHIP, GENERAL PARTNER
By: ADVENT INTERNATIONAL GPE VIII, LLC, GENERAL PARTNER
By: ADVENT INTERNATIONAL CORPORATION, MANAGER
/s/ James Westra
Name:	James Westra
Title:	General Counsel and Managing Partner
Date:	January 2, 2020

4

Joint Filer Information

Name of Joint Filer:	Advent Partners GPE VIII 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 PARTNERS GPE VIII LIMITED PARTNERSHIP
By: AP GPE VIII GP LIMITED PARTNERSHIP, GENERAL PARTNER
By: ADVENT INTERNATIONAL GPE VIII, LLC, GENERAL PARTNER
By: ADVENT INTERNATIONAL CORPORATION, MANAGER
/s/ James Westra
Name:	James Westra
Title:	General Counsel and Managing Partner
Date:	January 2, 2020

5

Joint Filer Information

Name of Joint Filer:	Advent International GPE VIII-A 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-A LIMITED PARTNERSHIP
By: GPE VIII GP LIMITED PARTNERSHIP, GENERAL PARTNER
By: ADVENT INTERNATIONAL GPE VIII, LLC, GENERAL PARTNER
By: ADVENT INTERNATIONAL CORPORATION, MANAGER
/s/ James Westra
Name:	James Westra
Title:	General Counsel and Managing Partner
Date:	January 2, 2020

6

Joint Filer Information

Name of Joint Filer:	Advent International GPE VIII-E 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-E LIMITED PARTNERSHIP
By: GPE VIII GP LIMITED PARTNERSHIP, GENERAL PARTNER
By: ADVENT INTERNATIONAL GPE VIII, LLC, GENERAL PARTNER
By: ADVENT INTERNATIONAL CORPORATION, MANAGER
/s/ James Westra
Name:	James Westra
Title:	General Counsel and Managing Partner
Date:	January 2, 2020

7

Joint Filer Information

Name of Joint Filer:	Advent International GPE VIII-G 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-G LIMITED PARTNERSHIP
By: GPE VIII GP LIMITED PARTNERSHIP, GENERAL PARTNER
By: ADVENT INTERNATIONAL GPE VIII, LLC, GENERAL PARTNER
By: ADVENT INTERNATIONAL CORPORATION, MANAGER
/s/ James Westra
Name:	James Westra
Title:	General Counsel and Managing Partner
Date:	January 2, 2020

8

Joint Filer Information

Name of Joint Filer:	Advent International GPE VIII-K 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-K LIMITED PARTNERSHIP
By: GPE VIII GP LIMITED PARTNERSHIP, GENERAL PARTNER
By: ADVENT INTERNATIONAL GPE VIII, LLC, GENERAL PARTNER
By: ADVENT INTERNATIONAL CORPORATION, MANAGER
/s/ James Westra
Name:	James Westra
Title:	General Counsel and Managing Partner
Date:	January 2, 2020

9

Joint Filer Information

Name of Joint Filer:	Advent International GPE VIII-L 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-L LIMITED PARTNERSHIP
By: GPE VIII GP LIMITED PARTNERSHIP, GENERAL PARTNER
By: ADVENT INTERNATIONAL GPE VIII, LLC, GENERAL PARTNER
By: ADVENT INTERNATIONAL CORPORATION, MANAGER
/s/ James Westra
Name:	James Westra
Title:	General Counsel and Managing Partner
Date:	January 2, 2020

10