Our Track Record
Project Portfolio
33 wastewater treatment projects delivered across Pakistan since 2011 — spanning sugar mills, community constructed wetlands, industrial ETPs, and housing society treatment systems.
Completed
Industrial
Critical GREEN designed, procured and established a Mechanical SBR Effluent Treatment Plant for Mujahid Oil Mills at Port Qasim, Karachi — delivering reliable biological treatment of edible-oil processing wastewater in a compact, industrial-grade configuration.
Completed
Industrial
Critical GREEN designed, procured and established a Mechanical SBR Effluent Treatment Plant for Pakeezah Dyeing & Bleaching, Karachi, engineered to handle the demanding combination of organic load and process contaminants typical of textile dyeing and bleaching wastewater.
Completed
Industrial
Critical GREEN designed, procured and established a Mechanical SBR Effluent Treatment Plant for Pakistan Oil Mills at its Kotri facility — treated water quality was verified on site through direct sampling of the finished effluent.
Completed
Industrial
A constructed wetland wastewater treatment system for Continental Biscuits, Sukkur — extending Critical GREEN's nature-based treatment experience beyond sugar mills into food processing, with treated effluent independently verified within SEQS guideline limits.
Completed
Sugar & Distillery
A constructed wetland wastewater treatment system for Al-Arabia Sugar Mills, Shahpur, Sargodha — nature-based biological treatment engineered to fit a sugar mill's seasonal crushing cycle with minimal energy demand.
Completed
Sugar & Distillery
A constructed wetland wastewater treatment system for Ramzan Sugar Mills, Bhawana, Chiniot, currently under construction — designed to minimize dependence on energy-intensive mechanical treatment while meeting environmental compliance.
Completed
Sugar & Distillery
A hybrid biological wastewater treatment system for Silanwali Sugar Mills, Farooka, Sargodha, combining anaerobic biological treatment with constructed wetlands — a staged design for high-organic-load sugar-industry wastewater, and one of Critical GREEN's more advanced treatment configurations.
Completed
Sugar & Distillery
A constructed wetland wastewater treatment system for Digri Sugar Mills, Taluka Digri, Mirpur Khas, Sindh — part of Critical GREEN's substantial constructed-wetland footprint across Sindh's sugar-processing sector.
Completed
Sugar & Distillery
A constructed wetland wastewater treatment system for Tharparkar Sugar Mills Limited, Mirpur Khas, applying engineered biological treatment and polishing to sugar-processing wastewater across one of Critical GREEN's deepest regional track records.
Completed
Sugar & Distillery
A constructed wetland wastewater treatment system for Sanghar Sugar Mills, Sanghar, Sindh — proof that nature-based treatment scales effectively even at large agro-industrial wastewater volumes.
Completed
Sugar & Distillery
A constructed wetland wastewater treatment system for Kiran Sugar Mills Limited, Sukkur, Sindh, selected specifically to reduce dependence on energy-intensive mechanical treatment across a seasonal crushing cycle.
Completed
Housing Societies
Critical GREEN designed, procured and established a Mechanical SBR wastewater treatment plant for Singhar Housing Society, Gwadar — centralized, reliable domestic sewage treatment for a planned residential community on Pakistan's Balochistan coast.
Completed
Housing Societies
A UASB reactor and constructed wetland wastewater treatment system for Rahman Enclave, Islamabad, providing decentralized biological treatment for domestic sewage generated within the residential development.
Completed
Housing Societies
A bioremediation-based constructed wetland system serving Quaid-i-Azam University's Department of Biotechnology — engineered to treat a distinctive mix of sewage and laboratory wastewater. Designed for 0.3 cusecs to NEQS standards, completed January 2013.
Completed
Housing Societies
A constructed wetland wastewater treatment system for Bahria Enclave, Islamabad, engineered for up to 85% reduction in COD, BOD, TSS and fecal coliform — demonstrating how nature-based treatment scales cleanly to planned housing developments.
Completed
Housing Societies
A constructed wetland wastewater treatment system for D.C. Colony / PGECHS, Gujranwala Cantonment. Designed for approximately 1.5 cusecs to NEQS discharge quality, completed January 2013.
Completed
Community & Development
The Jumman Shah Wetlands, Layyah District — delivered with Plan International, this constructed wetland brought decentralized sewage treatment to a community with no access to conventional infrastructure. Designed for 1.8 cusecs to NEQS discharge quality and completed December 2011, with a household-level biogas system added alongside it for domestic energy recovery — sanitation and renewable energy delivered as a single integrated intervention.
Completed
Community & Development
The Pattal Wetlands, Muzaffargarh District — delivered with Plan International, designed for 1.8 cusecs to NEQS discharge quality and completed December 2011. A household-level biogas system was implemented at Basti Pattal alongside the wetland, giving the community both improved sanitation and a renewable domestic energy source from the same intervention.
Completed
Community & Development
The Sherdil Mehar Wetlands, Ghotki District, Sindh — delivered with Plan International, designed for 1.7 cusecs to NEQS discharge quality and completed June 2012, bringing reliable, low-energy decentralized sewage treatment to a rural Sindh community.
Completed
Community & Development
The Thar Khwaja Wetlands, Thatta District, Sindh — delivered with Plan International, designed for 1.5 cusecs to NEQS discharge quality and completed June 2012, extending Critical GREEN's decentralized wastewater treatment experience into coastal Sindh.
Completed
Community & Development
The Jaro Babar Wetland, Hyderabad District, Sindh — delivered with Plan Pakistan / NRSP, designed for 1.1 cusecs to NEQS discharge quality and completed November 2012. The project combined technical wastewater-treatment design with community-level development implementation to deliver an environmentally appropriate sanitation solution.
Completed
Community & Development
The Sipahi Mangi Wetland, Khairpur District, Sindh — delivered with UNICEF, designed for 0.8 cusecs to NEQS discharge quality and completed October 2012, providing community-scale treatment through natural biological processes.
Completed
Community & Development
A constructed wetland at Village Rajib Pahore, Taluqa Thul, District Jacobabad, Sindh. The village was selected in a later phase of the program after an initial candidate site was found to have insufficient wastewater volume for a viable system — a decision that reflects Critical GREEN's practice of matching each treatment design to the site's actual conditions rather than applying a one-size-fits-all template.
Completed
Community & Development
The Nurpur Wetlands, Jaffarabad District, Balochistan — delivered with Plan International, designed for 1.1 cusecs to NEQS discharge quality and completed June 2012, demonstrating the adaptability of constructed wetland technology to rural communities in Balochistan.
Completed
Community & Development
The Beer Pani community wetland, Bagh District, Azad Jammu & Kashmir — a 40 household-level constructed wetland delivered with Plan International, designed for 0.7 cusecs to NEQS discharge quality and completed June 2012. A household-level biogas system was implemented alongside it, bringing sanitation and renewable energy together for this mountainous rural community.
Completed
Community & Development
The Jalala Wetland, Mardan District, KPK — delivered with UNICEF / Plan Pakistan, designed for 1.8 cusecs to NEQS discharge quality and completed January 2013. A household-level biogas system was implemented alongside it for domestic energy recovery, forming part of an integrated environmental intervention for the community.
Completed
Community & Development
The Khazana Wetland, District Peshawar, KPK — a community-based constructed wetland providing a locally appropriate alternative to conventional centralized wastewater infrastructure, paired with a household-level biogas system for domestic energy recovery.
Completed
Community & Development
The Behargarhi (Byar Ghari) Wetland, Tangi, Charsada District, KPK — one of the larger community-scale systems in Critical GREEN's portfolio, delivered with UNICEF / Plan Pakistan / NRSP. Designed for 2.2 cusecs to NEQS discharge quality and completed January 2013, with a household-level biogas system implemented alongside it for domestic energy recovery.
Completed
Community & Development
The Babaji Kalay Wetlands, Nowshera District, KPK — delivered with Plan International, designed for 1.2 cusecs to NEQS discharge quality and completed May 2012, providing a practical, low-energy wastewater treatment solution for the rural community.
Completed
Community & Development
The Chatal Wetlands, Chakwal District — delivered with Plan International, designed for 1.3 cusecs to NEQS discharge quality and completed May 2012, bringing decentralized biological treatment to a community without access to centralized sewage infrastructure.
Completed
Community & Development
A constructed wetland project at Village Ghari Afghana, Taxila, delivered in partnership with UNDP and completed in 2011 — part of Critical GREEN's early portfolio of decentralized, nature-based sanitation solutions for rural Punjab communities.
Completed
Environmental Studies
An Environmental Baseline Study for DHA Phase 10 (DHA-X), Lahore, covering hydrology, geology, seismology, climate, and drainage assessment for the Defence Housing Authority Lahore — delivered in partnership with The Urban Solutions (Pvt.) Ltd., demonstrating Critical GREEN's environmental consulting capability beyond wastewater treatment.
Completed
Research & Development
The NBS-QAU Resource Centre at Quaid-i-Azam University, Islamabad — Critical GREEN's own research, development and demonstration platform, where wastewater treatment, environmental biotechnology, bioremediation and constructed wetland concepts are developed and refined before being applied to real institutional, industrial, residential and community-scale projects across the portfolio.
Tell us about your project — industry, flow rate, and compliance requirements. We will prepare a free technical and commercial proposal within 48 hours.