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On-the-Fly Frac Pad Water Treatment Services
On-the-fly frac pad water treatment using EOS FLY units to meter oxidants, inhibitors, and H2S scavengers in real time, keeping KPI-driven water on spec.
Overview
Environmental Oilfield Solutions provides on-the-fly frac water treatment using custom FLY Units operated by EOS crews. Each unit injects oxidants, scale and corrosion inhibitors, and H₂S scavengers in real time to keep pad water on spec.
Integrated metering and testing let us adjust rates on the fly so programs stay within KPI targets while crews stay focused on pumping.
Use Cases
On-the-fly frac pad treatment for single-well or multi-well pads
Real-time dosing of oxidants, inhibitors, and H₂S scavengers at the pad
Programs with strict KPI or inlet water quality requirements
Outcomes
More consistent frac water quality and lower bacteria and H₂S levels
Reduced non-productive time tied to water quality or chemistry issues
Better control of chemical spend through metered, data-driven dosing
Features
OTF Water Treatment combines custom FLY Units with EOS field crews to keep frac water on spec in real time.
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Custom-built FLY Units that inject multiple chemicals at once, including oxidants, scale and corrosion inhibitors, and H₂S scavengers
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Integrated metering and testing on the unit so technicians can watch flow, dose, and KPIs while pumping
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Real-time rate adjustments to match changing water quality, pump rates, and operator KPI targets
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Suitable for source, produced, and high-reuse water with variable TDS and chemistry
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Service model that includes equipment, setup, operation, and performance tracking with no equipment markup
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OTF Water Treatment is used on frac pads that rely on mixed source, produced, and recycled water. Programs are tuned to each operator’s KPIs and verified with on-site testing and usage data.
Keeps bacteria and H₂S within target ranges across long frac campaigns
Supports more stable friction reducer and chemical performance by controlling water quality at the pad
Reduces non-productive time caused by foaming, scaling, sour water, or chemistry upsets
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Deployment scenarios
Set on the frac pad between storage (ponds or tanks) and the blender
Used at central reuse facilities feeding multiple pads with blended water
Paired with pond treatment when storage quality is variable or sour
Typical users:Completions and frac engineers
Water managers and midstream water providers
Operations and HSE leads responsible for water quality and KPIs
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Form and Delivery
Service delivered with EOS-owned FLY Units and field crews
Units include metering pumps, flow measurement, and sampling points
EOS sets up equipment on location and connects to site piping
EOS calibrates injection rates and manages chemical feeds from totes or bulk tanks
IntegrationFLY Units tie into existing transfer lines and manifolds via standard injection points
Can be placed on the frac pad or at a central reuse facility
Compatible with pond treatment, filtration, and broader reuse systems
KPI and usage data can be shared with the operator for reporting, optimization, and cost control
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Environmental Oilfield Solutions performs on-the-fly water treatment in alignment with operator safety programs, chemical SDS guidance, and all applicable regulations. Site-specific procedures always take priority.
Handling & PPEFollow operator PPE requirements for chemical handling (typically chemical-resistant gloves, safety glasses or face shield, long sleeves, and appropriate footwear).
Keep clear of pressurized lines, chemical injection points, and moving equipment during operation and maintenance.
Use proper lifting and hose-handling techniques when positioning chemical totes, lines, and injection skids.
Immediately report and respond to leaks, spills, or equipment damage according to site spill-response procedures.
Regulatory notesAll chemicals are used in accordance with their manufacturer SDS and operator-approved programs.
EOS technicians comply with site-specific permits, contractor orientations, and environmental reporting requirements.
Waste streams (empty totes, hoses, filters, and residual fluids) are handled and disposed of under the operator’s approved waste-management plan.
Complementary Products
Prepare, protect, and condition before drilling begins.
CleanTech 100
Product: Sodium Chlorite
A powerful oxidizing agent used to generate chlorine dioxide on-site for microbial control across hydraulic fracturing operations. Optimized for bacterial reduction in high-TDS and variable water conditions, it supports corrosion prevention, water recycling, and system efficiency.
- Microbial control in frac water
- Corrosion and H2S mitigation
- Water recycling and reuse operations
Complementary Services
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Data-driven support to design, troubleshoot, and optimize frac water treatment programs so operators cut chemical spend, prevent H₂S/bacteria issues, and keep KPIs on spec.
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In-house and field testing for bacteria, H₂S, oxidant demand, metals, and compatibility, giving operators the diagnostics needed to tune OTF programs and avoid chemistry conflicts.
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Targeted treatment of storage and production ponds to control H₂S, bacteria, algae, and sludge so source water feeding OTF systems stays stable, safe, and frac-ready.
Complementary Platforms
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CleanTech 100 Series oxidants sit at the core of EOS’s Water Treatment Platform. These chemistries pair with EOS water-treatment services for on-the-fly frac treatment and pond programs, cutting microbes, H₂S, and solids while keeping reuse water consistent, compliant, and field-ready.
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The CleanTech 400 Series powers EOS’s Remediation Platform, integrating with spill-response and soil-repair services. Products are engineered to treat brine and hydrocarbons in place, supporting closure-ready, low-disturbance site restoration that aligns with regulatory and ESG expectations.
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The CleanTech 700 Series anchors EOS’s Completion & Production Platform. Green acids and line-flush chemistries work alongside EOS field services to remove scale, clean up disposal and production systems, and keep SWDs and production assets flowing efficiently over the long term.
Tailored Chemistry at Speed
If it doesn’t exist yet, we’ll engineer it.
Environmental Oilfield Solutions can customize water treatment programs when standard oxidant packages are not enough. Our team blends chemistry, dosing strategy, and field testing so on-the-fly systems stay effective in difficult or changing water conditions.
Use Cases
Off-spec or variable source water that needs a custom oxidant and scavenger package
New basins, facilities, or KPIs that require rapid treatment design and validation
Optimizing existing OTF programs to cut chemical use while holding performance targets
Available Upon Request
Custom treatment design summaries and recommended operating windows
Extended lab and field test documentation for internal or regulatory review
Field performance reports and case examples where customers have approved sharing
EOS’s on-the-fly water treatment programs are designed to improve frac performance and support your ESG goals. By using oxidant-based chemistries and tailored dosing, EOS helps operators reduce hazardous biocide use, increase water reuse, cut hauling and disposal volumes, and limit odors and emissions from storage and flowback systems.
Learn more about EOS’s ESG approach and sustainability commitments.
Got 15 minutes?
Let’s solve your toughest site challenges.
Let’s review your water program and identify where oxidant strategy, microbial control, and reuse performance can be improved.