ASRus, LLC Hydrogeology & Water Resources
Rainbow over two drill rigs at a Class V exploratory injection well site

Serving Florida clients since 2006

Providing Solutions to Sustain and Protect Florida's Water Resources

ASRus, LLC, was founded in 2006 to provide hydrogeological related professional services to municipal and industrial clients in Florida. After 20 years of existence, ASRus has provided services on over 500 projects with over 100 municipal, industrial, and private clients throughout peninsular and panhandle Florida. During this time, ASRus has established itself as a recognized leader in providing innovative solutions to the management of water, wastewater, and reclaimed water through underground injection.

What We Do

Our specialty is the development of Underground Injection Control (UIC) projects throughout Florida including deep injection wells, ASR systems, and aquifer recharge wells. We promote innovative underground injection concepts to better utilize and manage Florida's water resources while protecting the environment. Another core focus of ASRus is groundwater supply and consumptive use permitting. We have a fully capable and experienced staff that can handle any groundwater development or underground injection project.

Drilling rig lit against a sunset at the TECO Big Bend injection well site

Underground Injection

Planning, permitting, design, construction oversight, and regulatory compliance stewardship.

Services →
Water surging from a well during development

Water Supply Development & Permitting

Consumptive use permitting, wellfield design, construction oversight, well field optimization.

Services →

ASRus is there for every phase of the project

  1. 1 Feasibility Feasibility studies and groundwater flow modeling.
  2. 2 Permitting FDEP UIC and water management district permitting.
  3. 3 Construction Oversight, casing seats, contractor coordination.
  4. 4 Testing Aquifer performance, water quality, cycle testing.
  5. 5 Compliance Mechanical integrity testing, annual reports.
  6. 6 Performance Performance evaluations and rehabilitations.

Our Approach

ASRus is well known among engineering firms in Florida as we routinely work in concert with these highly respected firms providing them specialized hydrogeologic services. ASRus has a reputation for developing cost effective, innovative solutions using underground injection. Our understanding of Florida geology and the conditions required for a successful UIC project is based on years of experience. This experience and our understanding of the regulations allow us to find solutions to complicated underground injection projects. Our clients and partners recognize our commitment to sensible solutions and trust that we are there to support them long after a project is complete.

Mark McNeal presenting a well cross-section and an aerial site map to a seated group

Some of Our Many Significant Accomplishments

Reclaimed-water ASR wellhead, its pipework painted the purple used for reclaimed water
Reclaimed water ASR wellhead — the first reclaimed water ASR operation permit.
Aerial view of the Piney Point injection well site, drill rig standing on the pad
Piney Point — the first Class I injection well to manage phosphate process water.
Cut-away three-dimensional schematic of a recharge well. Particle tracks leave the bottom of the well, rise to the base of an overlying lower-permeability zone and sweep downgradient over twenty years without crossing it, beneath a mounded head-buildup surface.
Aquifer recharge — where injected water goes over twenty years. Generalized schematic on a synthetic flow field, not model output. Not to scale.

General

  • Assisted over 100 municipalities and private clients throughout Florida to develop water supplies and UIC strategies to better manage water resources
  • Designed and permitted Class I, Class II, and Class V Groups 2, 3, 4, 6, 7, and 9 wells in Florida
  • Designed, permitted, and oversaw construction of injection wells utilizing the Upper Floridan aquifer (UFA), Lower Floridan aquifer (LFA), and sub-Floridan permeable zones for municipal and industrial wastewater disposal
  • Designed, permitted, and oversaw construction of UIC wells in south Florida, west central Florida, central Florida, northeast Florida, and the Florida Panhandle

Disposal Wells

  • Developed the first Class I injection well to manage phosphate process water
  • Among the first to develop non-Boulder Zone Lower Floridan aquifer Class I municipal and industrial injection wells in peninsular Florida
  • Permitting and senior technical support for the first sub-Floridan Class I injection wells completed to 8,000 feet
  • Designed, permitted, and oversaw construction of the first successful municipal injection wells in northeast Florida
  • Refined and implemented use of the Radioactive Tracer Survey for internal Mechanical Integrity demonstrations as an alternative to packer testing in Class I wells
  • Designed, permitted, and oversaw construction of the first industrial wastewater discharge into a G-II aquifer
  • Alternative well rehabilitation procedures developed to restore lost injection capacity where standard methods were ineffective

Aquifer Recharge

  • Industry leader in developing Aquifer Recharge projects to support additional groundwater withdrawal allocations
  • Permitted the largest reclaimed water aquifer recharge project in Florida
  • Designed, permitted, and oversaw construction of the first successful municipal effluent aquifer recharge well in central Florida

Aquifer Storage and Recovery (ASR)

  • Designed, permitted, and oversaw construction of ASR wells storing potable water, reclaimed water, and partially treated surface water in Florida
  • Provide continuous support to the two largest potable water ASR systems in Florida
  • Responsible for the completion of Florida's deepest ASR well to 3,000 feet
  • Responsible for the first reclaimed water ASR construction and operation permits
  • First ASR Ordinance to demonstrate Institutional Control in Florida
  • Successful operation of ASR wells in storage zones approaching seawater salinity
  • Pilot testing of raw surface water ASR to demonstrate microbial inactivation in the subsurface using a zone of discharge concept, conclusively demonstrating total coliform die-off with residence time in the Floridan aquifer
  • Developed and successfully permitted regulatory strategies (zone of discharge and water quality criteria exemption) for total coliform die-off in the subsurface
  • Industry leaders in managing arsenic mobilization through various treatment, operational, and regulatory strategies
Three-dimensional particle-tracking figure: tracks leave an injection well, spread through a gridded aquifer layer inside a transparent bounding box and are coloured by travel time, beneath a contoured head-buildup surface.
Illustrative particle tracking in a synthetic analytical flow field — a worked demonstration, not a calibrated model result.

Florida UIC Experience

Map of Florida showing ASRus's underground injection control experience by well class and water management district, August 2026

Groundwater Management at work

Sustainable water management solutions to protect our water resources

Underground injection is a multifaceted tool – below is an example of Aquifer Storage Recovery (ASR) used to store water in the aquifer, Aquifer recharge used to replenish depleted aquifers and mitigate saltwater intrusion, and Class I injection wells used to sequester wastewaters in saltwater zones isolated from usable portions of the aquifer.

Schematic cross-section through a generalized west-central Florida section showing four well types: a recharge well completed in the Avon Park high permeability zone, a brackish supply well and an ASR well completed in the Upper Floridan aquifer, and a Class I injection well completed in the Lower Floridan permeable zone. Filtered surface water from a pond feeds both the recharge well and the ASR well; the brackish supply well and the recovering ASR well feed a water treatment plant; and the reverse-osmosis concentrate from that plant joins the wastewater treatment facility's effluent in a shared line down the Class I injection well. Natural recharge * Intake filtration vault Water treatment plant WTP Wastewater treatment facility WWTF Industrial site — e.g. power plant cooling water Industrial Site RO concentrate Recharge Well to the APHPZ ASR Well stores & recovers BrackishSupply Well from the UFA Class I Injection Well to the LFA water returned to the aquifer water withdrawn * Generalized west-central Florida hydrogeology — schematic, not to scale. SA HAS Upper Floridan aquifer MCU Lower Floridan Surficial Deposits Surficial aquifer 0 Hawthorn Group ~50 ft Suwannee Limestone Permeable zone ~350 ft Ocala Limestone lower permeability ~600 ft Avon Park Formation ~900 ft Avon Park high permeability zone (APHPZ) ~1,000 ft Avon Park Formation Middle confining unit ~1,500 ft Oldsmar Formation Lower Floridan aquifer ~2,000 ft Lower Floridan permeable zone ~2,500 ft

WTP — water treatment plant. WWTF — wastewater treatment facility. RO — reverse osmosis, the membrane treatment that turns brackish water into drinking water and leaves a saltier concentrate behind.