Sensors & Solutions

Floods, Streams, Stormwater, Snow, & more…

ToltHawk is an intelligent water monitoring and alerting sensor for tracking floods, streams, snowpack, and sewer levels.

From early flood detection to water-level and streamflow monitoring, our technology provides precise, real-time data when it matters most. With dependable insights and user-friendly systems, ToltHawk enables better planning, faster emergency response, and greater climate resilience.

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How ToltHawk Works?

Install

Sensor is installed above the medium to be measured. No wiring or engineering needed.

Transmit

Sensors starts sending real-time data wirelessly. Detecting any changes in water, snow, sewer level.

View

You use the live dashboard to view data, track patterns, and make quick decisions to prevent potential risks.

Get Alerts

You receive instant alerts via phone or email whenever significant changes occur — you’ll know before issues escalate.

Select use cases for details:

Flood Monitoring

Floods move fast. So should your alerts.

River & Stream Monitoring

Stay ahead of river rise, stream surge, and seasonal shifts.

Snow Monitoring

Track snow buildup before it causes a breakdown.

Water Over Roadway

Spot road hazards before they put drivers at risk.

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Who uses ToltHawk?

County of Tulare, CA

University of Washington

US Forest Service

Auglaize County, OH

City of San Rafael

Madera County

City of La Center, LA

Clark County, WA

Douglas County, NV

DNR Washington State

NOAA

Hancock County, MS

Hawaii DOT

Hudson Lake Conservation District

City of Berkeley, CA

BLD Services, Louisiana

New York Power Authority

Auglaize County

Forrest County, MS

St Joseph River Basin Commission

St Clair Conservation District

Snohomish County, WA

Riley County, KS

Kankakee River Basin

County of Chelan, WA

County of Denton, TX

City of Duvall

Jones County, MS

Kankakee River Basin

Kittitas County, WA

Ballard County

Mason County, WA

Merced County

Maxwell Irrigation District, CA

Maumee River Basin Commission

Need reliable flood and river level monitoring?

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Want to contact our team and book a Demo? Try it now

Frequently Asked Questions

How to install?

ToltHawk sensors are self contained units and are therefore easy to install. Typical installation is over bridges or cantilever. See ToltHawk Installation Gallery for example installations

Do I need to sign in to view data?

As the owner admin, you can decide who can view the data. If you make the location public, anyone can view the hydrograph without signing in. If you mark the location private then only users who you allow will be able to view the data..

What is the range of sensor?

The range of our sensors is between 15cm (0.5′) to 20m (65′).

Do you have an API to integrate with my existing systems?

Yes, we have a JSON API that allows you to integrate with your own system or website.

Can I download my data?

As the owner of the gauge, you can download the data in any of these formats: Excel, CSV, PDF

How long do you keep the data?

Our normal data retention policy is 10 years.

After installation, is calibration required?

Our device do not require calibration after you install it. However, its a good practice to verify the data and communication before you leave the location.

Should I setup the device before leaving the installation site?

The device automatically starts sending data when placed vertically at the installation site. All settings can then be done from your desk via a web browser. There’s no specific configuration required at the installation site.

Who can install these sensors?

Our sensor devices are easy to install and most organizations chose to install it themselves. Before installation, please read our user manual for installation suggestions and examples. Also, please check local laws for any permits requirements, and restrictions to install in public right-of-ways.

Can I change units to metric?

Yes. Units are individual preferences and you can change it under your profile.

What is the angle of beam of the radar sensor?

The radar sensor has a narrow 3°-7° angle and therefore allowing sensing area to be pin pointed.

Who can access the data?

If the owner of the location, designates that location as Public in their dashboard, anyone, signed-in or not, can view the data of that location. If you want to restrict access to the location data, you must give them permission via your settings dashboards. In that case, the user 1) must create an account and 2) owner must give them permission via settings dashboard.

How often is website updated?

Our normal measurement frequency is 15 minutes, which matches USGS’s standard. However this can be changed by the owner of the gauge (you) via website. Measurement frequency of less than 5 minutes can be drain on the device’s battery. The measured data is then stored in the device’s memory until the next Update Cycle at which point all the stored data is uploaded into the cloud for you to view. The Update Cycle can be 15minutes to 3hours depending on your configuration.

Testimonials

The sensors have been a great tool for us. They really give us insight on what is happening during storm events at key locations without us having to physically be there. They provide a piece of mind that alleviates some of the stress of winter.

Ryan Montes
(Customer since Oct 2021)San Rafael Department of Public Works

Our 16 ToltHawk sensors paid for themselves the first month we installed them in the field. We normally send a crew to a remote bridge to remove the railings as a precautionary measure during flooding. This normally costs us sending a crew of 4 and two round trips to the remote location. With ToltHawk, we accurately found out that the water level started to recede which the naked eye couldn’t detect and therefore avoided that expense.

Ross Miller
(Customer since 2019)Director, Tulare County, RMS

Our three devices are working great and sending water tank levels. We had a leak last week and we received an alert on weekend. Allowed us to act quickly! Normally we would find out about the problem when an irate customer calls.

Steve Marshall BTTB, Luthersburg, PA