Quality water flows from quality experience.

RESPEC has a long track record of providing water quality technical support to federal, state, local, and private clients across the country.  We assess waterbodies, evaluate impairments, and compare water quality to applicable criteria. Our team also monitors ecological health to evaluate whether or not a designated use is being attained or is impaired.

RESPEC has extensive experience in developing water quality standards and criteria, developing Total Maximum Daily Loads (TMDLs), and evaluating and writing point-source permits. Our expertise is used in both water quality field services and water quality/watershed modeling. We have successfully developed many watershed implementation plans that incorporate the US EPA’s Nine Key Elements of Watershed Plans, completed or participated in Watershed Restoration and Protection Plans, and implemented recommended best management practices (BMPs). Our experienced project specialists are familiar with a wide variety of land uses including urban, irrigated cropland, and rangeland.

Water Quality Flyer


    • Quality Assurance Project Plans (QAPPs)
    • Sampling and Analysis Plans (SAPs)
    • Monitoring
    • Standards Development
    • Modeling
    • TMDLs
    • Implementation Planning
    • BMP Design
    • Watershed Restoration and Protection Strategies (WRAPS)
    • Watershed Assessments
    • Fish Monitoring
    • Macroinvertebrates and Periphyton
    • Water Quality Trading
    • Statistical Analysis
    • Stream Discharge Measurements
    • Water Quality Monitoring

Water Quality projects

Learn more about related projects where RESPEC has proven our expertise in this area.

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Aspen Rio Grande Park Stormwater Improvements

Engineering a water quality treatment facility at Rio Grande Park while ensuring that the park provides an aesthetic environment for visitors.

Belle Fourche River Watershed Implementation Project

Correcting sediment and bacteria impairments in and around the Belle Fourche River Watershed.

Best Management Practices Tracking

Tracking stormwater best management practices using mapFeeder™.

Big Sioux River Sediment and Bacteria Total Maximum Daily Load

Developing sediment and bacteria Total Maximum Daily Loads for the Big Sioux River.

Big Sioux Water Quality Trading Project

Assessing the sediment and bacteria impairments in the Central Big Sioux River Watershed and reducing pollution through a water quality trading.

Cape Fear River Watershed Model

Developing a Soil and Water Assessment Tool model to improve water quality in the Cape Fear River Watershed.

Clark Fork River Plains Reach Assessment

Identifying restoration alternatives to improve conditions and restore natural channel processes while protecting critical infrastructure and economically important lands.

Coal Creek Rock Creek Master Plan

Accelerating major drainageway planning studies in Colorado.

Contribution-Based Watershed Assessments

Using local watershed data and conditions to derive improvement fees.

Decision-Support Tools for Watershed Management

Developing custom tools to interpret model results for watershed management.

EPA Rates Manual

Reviewing and researching nutrient-related rates, constants, and kinetics in four water quality model frameworks.

EPA Steam-Generated Power Regulation

Modeling support for revisions of the Environmental Protection Agency's regulations for Steam Electric Power Generation.

High Line Canal

Developing practical solutions for repurposing the High Line Canal for collecting and treating stormwater runoff.

HSPF Code Conversion

Modernizing HSPF modeling code to maximize results.

Illinois River Total Maximum Daily Load

Modeling water quality and developing a Total Maximum Daily Load for the Illinois River Watershed.

Long Lake Creek Corridor Improvements

Establishing a more natural, sinuous channel and restoring wetlands in an area of a decommissioned wastewater treatment plant.

Lower Gallatin Watershed Restoration Plan

Providing a framework for implementing water quality improvements for sediment, nutrient, and E. coli pollutants on 15 impaired stream segments in the Lower Gallatin Watershed.

Middle North Platte Watershed Study

Creating an inventory of water and land resources within a Wyoming watershed.

Missouri River Ecosystem Restoration

Developing and implementing effective planning strategies for the Missouri River.

Mussel Data Analysis

Assessing and monitoring the condition of a mussel community during construction and operation of a 366-meter navigation lock.

Nutrient Reductions

Helping Minnesota implement its nutrient-reduction strategy and reduce its impact on downstream waters supporting local, state, and international water quality efforts.

Piney Creek Major Drainageway Plan

Mitigating severe channel degradation, erosion, and heavy sediment deposition in the Piney Creek drainageway.

Red River of the North Stressor-Response Model

Examining the relationships between the biological community and nutrients in the International Red River Watershed.

Samson Pipeline Release Spill Investigation and Cleanup

Investigating environmental impacts from an oil-and-gas spill.

SARA Water Quality Modeling Tool Development

Developing software tools to facilitate watershed modeling and planning in San Antonio River Authority’s (SARA) watersheds.

Source Water Watch

Developing a consumer-based product with substantial geospatial-analysis components.

Spring Creek Watershed Restoration

Keeping streams clean in the Black Hills.

Statewide Water Quality Program Support

Supporting the Colorado Department of Transportation's statewide water quality program.

Superfund Performance Monitoring

Evaluating the ecological response to large-scale Superfund remediation of the Upper Clark Fork River Basin in western Montana.

SWMM Stormwater Planning Plug-In for Open Planning Tools

Creating new tools for computing stormwater runoff in urban areas.

Temperature Total Maximum Daily Load Assessment

Supporting aquatic life by defining allowable heat loads and implementation plans for streams in the Black Hills.

Using Basins.MIL to Evaluate Climate Non-Stationarity

Understanding and managing the potential impacts of climate change and land-use change at a watershed scale.

Yellow Medicine Project – One Watershed One Plan

Guiding southwest Minnesota partners to develop the next generation of watershed planning for the Yellow Medicine River.
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Water Quality products

RESPEC’s product line is geared toward making businesses and organizations better, faster, smarter, and safer. Our products benefit clients in need of greater efficiency, accuracy, and cost savings.

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BASINS integrates environmental data, analysis tools and watershed and water quality models to assist in managing watersheds and developing Total Maximum Daily Loads (TMDLs).


HSPEXP+—An enhanced expert system for calibration of HSPF.

Hydrologic Simulation Program‑FORTRAN (HSPF)

Hydrologic Simulation Program‑FORTRAN (known as HSPF) is an analytical tool that has applications in planning, designing, and operating water-resources systems. 

Hydrologic Simulation Program–Python (HSP2)

RESPEC’s Hydrologic Simulation Program–Python (HSP2) model uses modern technology to improve upon its predecessor Hydrologic Simulation Program–FORTAN (HSPF) model.

SARA Load Reduction Tool  

SARA Load Reduction Tool — Allowing users to determine the constituent load reductions needed to reach water quality standards in model reaches within a watershed.

SARA TS Utility  

SARA Timeseries Utility supports the analysis and management of time-varying environmental data.

Scenario Application Manager (SAM)

RESPEC’s HSPF Scenario Application Manager (SAM) is a comprehensive decision-support tool for planning and implementing targeted actions to restore or protect water quality.
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Jason Love, PE
Senior Vice President, Water & Natural Resources


Brian Bricknell
Senior Staff Engineer