At Brennan, we deliver full‑spectrum water treatment services for dredging, industrial wastewater, and hazardous discharge challenges. Our experienced team, augmented by the recent addition of Infrastructure Alternatives, Inc.’s (IAI) water treatment division, brings superior expertise, equipment, and proven system designs.

Contaminants We Treat

  • Benzene, toluene, ethylbenzene, and xylene (BTEX)
  • Heavy metals, such as mercury
  • Oil and grease
  • Per- and polyfluoroalkyl substances (PFAS)
  • Polychlorinated biphenyls (PCBs)
  • Polyaromatic hydrocarbons (PAHs)
  • Semi-volatile organic compounds (SVOCs)
  • Total suspended solids (TSS) and turbidity
  • Volatile organic compounds (VOCs)

Our Equipment

  • Bag filters
  • Granular activated carbon (GAC)
  • Inclined plate clarifiers
  • Mix, settling, and storage tanks
  • Multimedia filters
  • Oil water separators
  • Polymer systems

At J.F. Brennan Company, we deliver full‑spectrum water treatment services for dredging, industrial wastewater, and hazardous discharge challenges. Our experienced team, augmented by the recent addition of Infrastructure Alternatives, Inc.’s (IAI) water treatment division, brings superior expertise, equipment, and proven system designs. 

What We Do

We work with you to design, permit, and operate water treatment systems that achieve regulatory compliance without compromising schedule or budget. Our capabilities include:

  • System design & engineering

  • Startup and demobilization

  • Experienced, certified operations staff

  • Regulatory agency coordination & permitting (including NPDES)

  • Compliance monitoring & discharge reporting

  • Treatability testing and pilot studies

  • Chemical selection & jar testing

  • Sampling, analysis, and data‑driven optimization

  • Equipment rental & mobile/trailer‑based treatment options

Contaminants & Conditions We Address

We treat a wide spectrum of problematic substances and issues, including:

  • Total suspended solids (TSS), turbidity

  • Heavy metals (lead, mercury, etc.)

  • PFAS / PFOS / PFOA

  • PCBs and PAHs

  • Oil & grease

  • BTEX (benzene, toluene, ethylbenzene, xylene)

  • VOCs and SVOCs

  • Other organic and inorganic pollutants

Mobile & Specialized Solutions

Need water treatment deployed quickly on-site? We offer mobile treatment trailer systems for projects requiring rapid response or flexibility. Whether for remote locations, changing site conditions, or emergency work, we tailor the solution to your constraints.