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Grupo HOH

Smart water supply systems · Since 2009

Safe drinking water for Latin America

Ultrafiltration plants with our own control systems, 24/7 remote monitoring and artificial intelligence. We design, manufacture, install and operate them for municipalities, water utilities and industry across the region.

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About us

Latin American engineering to bring drinking water where it is needed most

GRUPO HOH S.A.S. is a drinking water technology and engineering company, headquartered in Colombia and serving all of Latin America. Since 2009 we have designed, manufactured, installed and operated ultrafiltration water treatment plants, many of them in containers, with control electronics, firmware and telemetry developed in-house. This is how we build smart water supply systems: HOH Brain runs each plant autonomously and OneWater brings its data together, where artificial intelligence helps anticipate maintenance.

Our goal is to bring drinking water to every rural community and organization with shortfalls in water quality, supply or service, through sustainable and efficient solutions.

HOH was founded by Jaime Roldán, a civil engineer from the Universidad Nacional de Colombia with a master's degree from Penn State. Today it brings together a team with more than 50 years of experience in technology development.

Year HOH was founded
2009
Drinking water projects delivered
40+
Years of team experience in technology development
50+
People with drinking water in Latin America: our goal for 2030
1 million
  • Latin American engineeringDesigned and manufactured in Colombia, with our own electronics.
  • 24/7 remote monitoringTelemetry for every plant through OneWater.
  • Modular and containerizedTransportable plants that are quick to install and have a small footprint.
  • Water that meets the standardWe design to each country's drinking water standard; in Colombia, we comply with Resolución 2115 of 2007 (drinking water quality).
In Latin America and the Caribbean, 1 in 4 people does not have safely managed drinking water. In rural areas it is almost half (47%), and 17 million people do not have even a basic water service.
WHO/UNICEF Joint Monitoring Programme (JMP), 2020 data.

Services

From design to operation, one company accountable for the water

We support municipalities, regional governments, water utilities and industry across Latin America at every stage of the project.

  1. Rural water system on a coffee-growing hillside: intake on the stream, pipeline to the treatment plant and the storage tank, with a town in the background

    Integrated water supply projects

    For municipalities, regional governments and water utilities.

    • Ultrafiltration plant
    • Depending on the project: intake, tanks, transmission lines and distribution networks
    • Civil works, telemetry and laboratory
    • EPC delivery: design, supply and construction with a performance guarantee
  2. Ultrafiltration plant with a row of white membrane modules on a galvanized frame, pipes and pressure gauges, under a metal roof

    UF plant sales

    Fixed and mobile containerized ultrafiltration plants, with installation and follow-up.

    • Industry
    • Housing and real estate developers
    • Community water systems and schools
    • Emergency response
  3. Technician in a hard hat and safety glasses adjusting a valve next to a new pump, beside the concrete tanks of an existing plant

    Upgrades and support

    We bring existing water systems to a higher level of service.

    • Upgrading existing water systems
    • Plant operation
    • Preventive and corrective maintenance
  4. A hand filling a glass with clean water from the outdoor sink tap of a rural home with flowers

    Water as a Service (WaaS)

    HOH designs, builds, finances and operates the plant. The client pays per cubic meter of water.

    • No capital investment for the client
    • Payment per m³ consumed, with no hidden costs
    • Guaranteed operation and maintenance
    • Long-term bulk water sales
  5. Operator holding a tablet that shows monitoring charts and a map, in front of a plant's ultrafiltration modules

    OneWater

    Software platform for water utilities: telemetry, operations and management in one place.

    • Real-time plant monitoring
    • Customer management and billing
    • Dashboards for local and regional governments
Two open HOH containers with ultrafiltration equipment and filters, next to a water tank in a mountainous area

Modular containerized plants

They arrive ready to connect: transportable, quick to install, and with their own electronic control and telemetry.

Our plants

An ultrafiltration plant for every size of water system

From a few homes to an entire municipality: modular plants that grow with demand.

  • Render of the compact UF-PP plant

    UF-PP

    0.4 – 0.8 m³/h

    0.11 – 0.22 L/s

    17 – 33 homes

    0.50 × 1.60 × 1.0 m

  • Render of the rack-mounted UF-LL plant

    UF-LL

    1.6 – 3.2 m³/h

    0.44 – 0.88 L/s

    67 – 133 homes

    0.35 × 2.0 × 1.80 m

  • Render of the UF-SG plant with four membrane modules

    UF-SG

    8 – 16 m³/h

    2.2 – 4.4 L/s

    333 – 667 homes

    1.0 × 2.40 × 1.40 m

  • Render of one rack of the modular UF-MX plant

    UF-MX

    24 – 96 m³/h

    6.67 – 26.67 L/s

    1,000 – 4,000 homes

  • Render of a large-scale UF-MX plant connected to a storage tank

    Large water systems

    Large-scale UF-MX plants for municipal town centers.

    Flow
    192 – 768 m³/h and more53 – 213 L/s
    Serves
    8,000 – 32,000 homes and more
  • Render of an ultrafiltration plant inside an open container

    Portable containerized plants

    Smart water systems that arrive ready to connect, also for emergencies.

    Flow
    36 – 72 m³/h10 – 20 L/s
    Serves
    1,500 – 3,000 homes and more
  • Render of a compact plant in a transportable metal module

    Compact units for emergencies

    Small, transportable units to respond to an emergency or serve an isolated community.

    Flow
    1 – 3.2 m³/h0.2 – 1 L/s
    Serves
    17 – 133 homes

For emergencies and isolated communities

Containerized plants with solar power, storage and water points that reach places with no power grid and no water system.

HOH containerized plant and elevated tank next to a rural school, with handwashing stations for the students
HOH containerized plant with solar panels, elevated tanks and a water point for a community in a desert area
  • Satellite connectivityCommunity internet and plant monitoring where there is no signal.
  • Solar or hydro powerFor areas with no power grid or with frequent outages.
  • StorageTanks for drinking water and rainwater.
  • Dispensers and handwashing stationsOn-site distribution of drinking water.

Reference capacities. The number of homes is an estimate and depends on consumption and on the water source.

How it works

Ultrafiltration: a physical barrier for water

Water passes through membranes with microscopic pores that retain suspended solids, bacteria, viruses and other pathogens. The result is high-purity water that meets the drinking water standard (in Colombia, Resolución 2115 of 2007 on drinking water quality), with minimal use of chemicals.

  • 99.99% removal of viruses and bacteria
  • Minimal use of chemicals
  • High tolerance to changes in the source
  • Membrane service life of 3 to 7 years
  • Modular: grows with demand
  • Transportable in a container
From turbid water to clear water: this is how ultrafiltration works.

  1. Raw water

    Water arrives from the source carrying solids, turbidity and microorganisms.

  2. Ultrafiltration membrane

    The membranes act as a physical barrier: they retain solids, bacteria, viruses and turbidity.

  3. Drinking water

    Clear, safe water comes out, ready to be stored and distributed to the community.

  4. Control and monitoring

    HOH Brain, the brain of each plant, runs it autonomously. Data reaches the Unified Monitoring Center via satellite, cellular network or Wi-Fi.

Gallery

Real plants, built and installed by HOH

Photographs of our ultrafiltration plants in municipalities, housing developments, homes and industry.

OneWater platform

The software that connects the plant with the water utility

OneWater brings plant telemetry, operations and the utility's customer management together on a single platform. 24/7 remote monitoring so that every liter is under control.

Software by Grupo HOH.

Platform operations screen: coverage, continuity and loss indicators, a map of the region with the status of each system, and an artificial intelligence assistant (opens the full image)
Monitoring centerStatus of every plant and its alerts on a map, in real time.

  • For governments and regulators

    Every water system in the region on a single dashboard.

    • Plant monitoring and alerts on a map
    • Coverage, gaps and investment prioritization by area
    • Cadastre and water utilities across the region

  • For the water utility

    Operation and management of the water system in the same platform.

    • Telemetry: turbidity, pH, pressure, levels and consumption
    • Cadastre, billing, collections and customer complaints
    • Formalization and tariff studies under each country's regulations

  • For the end user

    An app for the water service, with verified identity.

    • Balance, payments and bills
    • Consumption history
    • Notifications, requests and support

  • Artificial intelligence across the platform

    An assistant that answers questions about operations, predictive maintenance of the plants and payment scoring of users.

    Would you like to see OneWater?

    Request a demo (form in Spanish)

Reference projects

Projects already delivering drinking water

Some of the projects behind our experience.

  • Render of the layout of a municipal ultrafiltration plant

    Public sector

    Municipality in Antioquia

    Ultrafiltration plant for the municipal water system.

    7.8 L/s
    28.1 m³/h
    homes
    1,500
    people
    6,000–7,000
  • Open enclosure with an 8 m³/h ultrafiltration plant

    Public sector

    Municipality in Antioquia

    Ultrafiltration plant in an enclosure.

    2.2 L/s
    8 m³/h
    homes
    250–300
    people
    1,000–1,200
  • Open metal enclosure with a 16 m³/h ultrafiltration plant

    Public sector

    Municipality in Antioquia

    Ultrafiltration plant in a metal enclosure.

    4.44 L/s
    16 m³/h
    homes
    300–600
    people
    1,200–2,400
HOH ultrafiltration plant with dozens of membrane modules on racks and a screen showing the plant's telemetry

Public sector

Multi-community rural water system

Ultrafiltration plant that supplies several rural communities, with the operation's telemetry on screen.

Other projects inMunicipal water systemsWater utilitiesHousing developments and gated communitiesHomesIndustryHealthcare

Clients

Some of our clients

Water utilities, industry, flower growers and housing developments that trust HOH.

  • CAM Empresa de Servicios Públicos
  • EPM Ventures
  • Grupo Argos
  • Baxter
  • Prebel
  • Arquitectura & Concreto
  • Sampedro
  • Deliflor
  • Capiro
  • Sayonara
  • Plantas del Tambo
  • Guamito
  • Aqualife
  • Gestiones & Representaciones Chía
  • Monte Sereno
  • Sierra Grande

Who we serve

Drinking water for every territory and every water utility

We work with governments, municipalities and water utilities across Latin America, as well as with industry, housing and schools.

Download the technical sheet (PDF, in Spanish)To share with your team, the council or the funder.

  • Regional governments and water programs

    Drinking water programs at regional or national scale.

    • Integrated projects covering several municipalities
    • Monitoring of every system from a regional dashboard
    • Investment prioritization by area

  • Municipalities

    Urban and rural water systems monitored from day one.

    • Plants for town centers and rural communities
    • Water that meets the drinking water standard
    • No upfront investment with Water as a Service

  • Water utilities and community water systems

    Upgrades, operation and utility management.

    • Upgrading existing water systems
    • Plant operation and maintenance
    • Formalization, tariffs and customer management in OneWater
  • Cost efficiencyLower implementation and operating costs, without major civil works.
  • Public healthHigh-quality drinking water and fewer waterborne diseases.
  • Environmental sustainabilityResponsible water use and a smaller water footprint.
  • Transparency and traceabilityReal-time data for informed decisions.

We also serve

  • IndustryWater for processes and staff.
  • Developers and housingDrinking water for new developments.
  • SchoolsSafe water for students.
  • EmergenciesMobile containerized plants.

Contracting models

Three ways to contract, depending on who invests and who operates

With each client, we choose the model that best fits their budget and their operating capacity.

  • Sale and follow-up

    The client buys the plant

    Who invests?
    The client
    Who operates?
    The client, with follow-up from HOH
    How is it paid?
    Equipment purchase
    • Supply and installation of the plant
    • Full ownership of the equipment

  • EPC

    Engineering, procurement and construction

    Who invests?
    The client
    Who operates?
    The client, with maintenance by HOH
    How is it paid?
    Contract for the complete project
    • Design, supply and construction
    • System delivered fully operational
    • Performance guarantee
  • No upfront investment

    Water as a Service

    WaaS: HOH finances and operates

    Who invests?
    HOH and its financing partners
    Who operates?
    HOH
    How is it paid?
    Per cubic meter of water
    • Design, construction, operation and maintenance
    • All operating costs covered by HOH
    • Also available as a concession

Team

The people behind HOH

HOH team at a completed installation, in front of the storage tank and the containerized plant
  • Miguel Roldán

    Miguel Roldán

    CEO

  • Jaime Roldán

    Jaime Roldán

    COO

  • Esteban Pérez

    Esteban Pérez

    CTO

  • Mónica Arbeláez

    Mónica Arbeláez

    Administrative Director

  • Carlos Muñoz

    Carlos Muñoz

    Support Lead

  • Claudia Trujillo

    Claudia Trujillo

    Project Engineer

  • Darwin Villalta

    Darwin Villalta

    Electronics Lead

  • Joan Ospina

    Joan Ospina

    Support Lead

Contact

Let's talk about your project

Tell us what you need: the country and the site, the water source and the population to be served. We work on projects across Latin America.

Would you like a preliminary design for your plant?Answer a few questions, upload your water analysis and we will reply in less than 24 hours. The online quoter is available in Spanish only.Get a quote (in Spanish)

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