Simonton Lake in Elkhart, Indiana, is a popular destination for boating, fishing, swimming, and other water activities. Because so many residents and visitors share the lake, boating rules are important for protecting safety and preserving the quality of life for everyone around the shoreline. One important restriction concerns wake surfing after dark.

Wake surfing is a popular recreational activity in which a boat creates a large, continuous wake that a rider can surf without being directly pulled by a rope. While the activity can be enjoyable during permitted hours, operating a wake-surfing boat at night creates additional safety concerns.

Why Nighttime Wake Surfing Is a Concern
Boating after dark is fundamentally different from boating during daylight. Visibility is reduced, making it harder for operators to see swimmers, kayaks, paddleboards, docks, anchored boats, and other potential hazards.

Wake surfing also requires a boat to operate in a particular manner and produce a substantial wake. At night, other lake users may have difficulty recognizing the boat's movement or determining how much distance they need to maintain.

The restriction on nighttime wake surfing helps reduce these potential conflicts and allows lake users to enjoy Simonton Lake while maintaining safer nighttime conditions.

Understanding the Difference Between Boating and Wake Surfing
The nighttime restriction should not necessarily be interpreted as meaning that all boating on Simonton Lake is prohibited after dark. Different activities can have different requirements and restrictions.

Boat operators should understand the specific rules that apply to their activity rather than assuming that the rules for ordinary nighttime navigation are the same as those governing wake surfing.

Anyone operating a boat should also make sure the vessel has the required navigation lights and safety equipment and that the operator understands applicable Indiana boating laws.

Check the Current Rules
Boating regulations can change, and local lake restrictions may differ from general statewide boating requirements. Residents should consult the current Indiana Department of Natural Resources boating regulations and any applicable Simonton Lake rules before heading onto the water.

This is particularly important for wake-surfing activities because restrictions can address more than simply the time of day. Rules may also concern operating distances from shore, other boats, docks, swimmers, and structures.

Rather than relying on information from an old boating season, check the current requirements before participating.

Respect Your Neighbors
Simonton Lake is surrounded by homes and residential properties. Large wakes can affect more than the people inside the boat creating them. A wake can reach docks and shorelines, potentially causing rocking, erosion, or damage depending on conditions.

At night, residents may also be enjoying quieter activities around their homes. Following nighttime restrictions helps reduce conflicts between recreational boating and residential lakefront living.

Responsible boating means considering everyone who uses the lake—not just the people in your boat.
Safety Should Come FirstWake surfing can be an exciting activity, but safety should always take priority over getting in one more ride. If the permitted wake-surfing hours have ended, boaters should stop the activity rather than trying to continue after dark.

Parents should also make sure children and other passengers understand that nighttime conditions can make the water considerably more difficult to navigate.

A Shared Responsibility
Keeping Simonton Lake safe is a responsibility shared by boat operators, passengers, residents, visitors, and other lake users. Understanding when wake surfing is permitted is one part of being a responsible Simonton Lake boater.

If you're planning to wake surf on Simonton Lake, check the current rules and restrictions before launching, pay attention to the time, and end wake-surfing activities before the nighttime restriction takes effect.

By following the rules and respecting other people on and around the lake, Simonton Lake can remain a place where boating, fishing, swimming, and other recreational activities can be enjoyed responsibly.

Boating safety rules can change from one legislative session to another, which can sometimes create confusion for boaters on Simonton Lake in Elkhart, Indiana. One example is the proposed requirement for a red or orange safety flag when towing someone behind a boat.

During the 2026 Indiana legislative session, House Bill 1077 proposed several changes to Indiana boating laws. One provision would have required a person on a boat to use a red or orange safety flag when a person being towed entered the water. However, HB 1077 did not become law. The Indiana General Assembly's records show the bill was referred to the House Natural Resources Committee and became inactive rather than completing the legislative process.

For Simonton Lake residents, understanding this distinction is important.
What House Bill 1077 Proposed
HB 1077 was introduced as a boating-safety measure. Among other provisions, it proposed requiring people being towed by a motorboat to wear a personal flotation device, establishing counterclockwise operation on inland lakes, restricting towing between sunset and sunrise except for assisting a distressed boat, and requiring a red or orange safety flag when a person being towed entered the water.

The proposed flag requirement was intended to make a person in the water more visible to other boaters. A brightly colored flag can communicate that someone is in the water behind or near a boat and that other vessels should exercise additional caution.

However, the proposed flag requirement was not enacted through HB 1077.
That means boaters should not assume that HB 1077's proposed flag requirement is currently an Indiana statewide law simply because the proposal was discussed during the legislative session.

What the Existing Law Requires
Although the proposed flag requirement did not pass, Indiana already has important laws governing towing activities.
Under Indiana Code 14-15-3-20, a motorboat towing a water skier, watersled, aquaplane, similar object, or person must have another person aboard who gives their entire attention to watching the person or object being towed. The operator must devote their entire attention to operating the boat.

This is particularly important on a busy recreational lake such as Simonton Lake. The operator needs to concentrate on navigation, while the observer watches the person being towed.
Indiana law also requires boat operators to operate carefully and prudently, taking into account the safety of other people, weather conditions, hazards and the density of boat traffic.

Safety Still Matters Without a Flag Requirement
The fact that a proposed flag requirement did not become law does not mean boaters should ignore visibility and safety.
Water skiers, wakeboarders, tubers and other people being towed can be difficult for approaching boaters to see, particularly when they are in the water. A responsible boat operator should maintain a safe operating area and remain alert to surrounding traffic.
Indiana law also addresses certain dangerous practices involving people around the stern of a moving boat. For example, state law prohibits certain activities involving individuals holding onto the swim platform, swim deck, swim step, swim ladder or exterior transom while the boat is underway.

Check Current Rules Before Heading Out
Boating regulations can change, and lake-specific restrictions may also apply. The Indiana DNR maintains boating resources and advisories for Indiana waterways, making it a useful source for checking current requirements before launching.

For Simonton Lake boaters, the best practice is to distinguish between proposed legislation and enacted law. HB 1077 proposed a red or orange flag requirement for towing activities, but that proposal did not become law.
That does not make the safety concept unimportant. A visible flag may still be a useful voluntary safety practice when towing someone, provided it is used appropriately and does not conflict with applicable rules.

Keeping Simonton Lake Safe
Simonton Lake is shared by homeowners, fishermen, swimmers, kayakers, pontoons, personal watercraft and boats towing people on recreational devices. Good boating practices benefit everyone.

Whether or not a particular safety measure is legally required, boat operators should keep a dedicated observer aboard when towing, maintain awareness of other vessels, operate prudently and make the safety of the person being towed a priority.

The important takeaway for Simonton Lake: the red-or-orange-flag requirement discussed in House Bill 1077 was a proposal, not an enacted requirement. Because boating laws can change, residents should check the current Indiana DNR and Indiana Code requirements rather than relying on information about a bill that did not pass

Keeping Simonton Lake clean and healthy requires more than simply looking at the water and deciding whether it appears clear. Regular water-quality monitoring provides valuable information about nutrients, algae, clarity, and other conditions that can affect the lake's ecosystem. For residents of Simonton Lake in Elkhart, Indiana, an important part of this work is conducted through the Indiana Clean Lakes Program, with help from local volunteers.  The program is particularly important because Simonton Lake has a large residential community and is heavily used for boating, fishing, swimming, and other recreational activities.

Indiana Clean Lakes Program
The primary statewide program involved in this monitoring is the Indiana Clean Lakes Program (INCLP). The program was developed in partnership with the Indiana Department of Environmental Management (IDEM) and is administered through Indiana University's O'Neill School of Public and Environmental Affairs. INCLP has conducted statewide lake monitoring since 1989.  The program uses both professional researchers and trained volunteers to gather information about Indiana lakes. Its testing can include measurements such as water temperature, dissolved oxygen, pH, conductivity, water transparency, nitrogen, phosphorus, and chlorophyll.
This makes the program much more than simply checking whether the water "looks clean." Scientists can use the information to identify long-term trends and potential environmental problems.

Local Volunteers Play an Important Role
One of the most interesting aspects of the Clean Lakes Program is that local residents can participate in collecting data.  Simonton Lake became part of the Indiana Clean Lakes Program in 2022. According to the Simonton Lake Area Homeowners Association, the first monitoring seasons concentrated on water transparency, which is measured using a Secchi disk. A volunteer lowers the disk into the lake and records the depth at which it can no longer be seen.

The Simonton Lake monitoring effort has included local volunteer Lesa Hershberger and her team, who were specifically recognized for submitting numerous batches of monitoring data. Indiana's statewide volunteer-monitoring report also identifies Lesa Hershberger as the primary volunteer associated with Simonton Lake.
This volunteer component is extremely valuable. Local residents can collect information regularly and help create a much longer record of changes than a single occasional study could provide.

What Is Being Tested?
Water monitoring on Simonton Lake can involve several different measurements depending on the particular program or sampling effort.
The Clean Lakes Program looks at characteristics including:

• Water clarity
• Temperature
• Dissolved oxygen
• pH
• Nitrogen
• Phosphorus
• Chlorophyll
• Conductivity
• Plankton and other biological indicators

The program explains that volunteer monitoring supplements professional assessments by allowing trained citizen scientists to collect information over longer periods.

Local monitoring has also provided useful information about Simonton Lake's clarity. The Simonton Lake Area Homeowners Association reported that the lake's average clarity during the busy summer months of 2023 was approximately 7.9 feet, with a yearly maximum of 9.1 feet and minimum of 7.1 feet.

Other Water Monitoring Takes Place, Too
It is important to understand that the Clean Lakes Program isn't necessarily the only organization or agency collecting water samples in the Simonton Lake area.

The Indiana Department of Environmental Management (IDEM) conducts its own surface-water monitoring throughout Indiana. IDEM collects and analyzes water and biological samples from lakes, rivers, and streams as part of its statewide monitoring responsibilities.

There have also been Elkhart-area monitoring programs that included Simonton Lake sampling locations. For example, Elkhart-area surface-water reports have documented sampling at locations on Simonton Lake and included measurements such as dissolved oxygen, pH, temperature, conductivity, nitrates, phosphorus, total suspended solids, and E. coli.

Therefore, when discussing "water testing" on Simonton Lake, it is helpful to distinguish between the various monitoring programs rather than assuming that one organization performs every test.

What About the Simonton Lake Conservancy District?
The Simonton Lake Conservancy District also plays an important role in protecting and managing the lake, but it should not automatically be considered the organization performing every water-quality test.
The Conservancy District has responsibilities involving drainage, erosion, operation and maintenance, recreation, and sewage. Its history is closely connected to efforts to improve water quality around Simonton Lake, particularly through development of the community sewer system.
The Simonton Lake Area Homeowners Association also has an Environment Committee that focuses on water quality, water clarity, invasive species, and the ecological balance of the lake and watershed. The committee communicates environmental issues with the Conservancy District.
In other words, maintaining Simonton Lake's environmental health involves several organizations, agencies, researchers, and community volunteers.
Why the Testing MattersWater testing gives the Simonton Lake community objective information about what's happening beneath the surface.
Nutrients such as nitrogen and phosphorus are particularly important because excessive concentrations can contribute to algae and aquatic plant growth. Changes in water clarity can also provide clues about sediment, algae, and other conditions within the lake.
Long-term monitoring is especially useful because one water sample represents only a moment in time. Collecting measurements repeatedly throughout the year and across multiple years makes it possible to identify trends.
For a recreational lake like Simonton Lake, that information can help residents and lake-management organizations make better decisions about conservation, vegetation management, runoff, and other environmental concerns.
A Community EffortUltimately, clean water on Simonton Lake is a community responsibility. The Indiana Clean Lakes Program provides the scientific framework and training, Indiana University administers the statewide program, state agencies provide additional monitoring and oversight, and local volunteers contribute valuable observations and measurements.
Residents also have an important role. Limiting fertilizer runoff, properly maintaining septic or sewer connections, preventing erosion, keeping pollutants out of stormwater, and avoiding unnecessary disturbance of shoreline habitat can all contribute to the lake's long-term health.
ConclusionThe Clean Lake water testing on Simonton Lake isn't handled by just one person or organization. The Indiana Clean Lakes Program, administered through Indiana University's O'Neill School in partnership with IDEM, provides an important statewide monitoring framework, while trained Simonton Lake volunteers collect valuable local data.
Additional monitoring by state and local programs helps provide an even broader picture of water quality.
For Simonton Lake residents, this ongoing testing is an important resource. It transforms observations about the lake into measurable information that can help the community protect one of Elkhart County's most important natural and recreational resources.

Simonton Lake, a roughly 300-acre recreational lake in Elkhart County, Indiana, is widely regarded as having better water quality than many other lakes across the state. While it is not a pristine wilderness lake, long-term monitoring shows it maintains moderate nutrient levels, relatively good clarity, and conditions suitable for boating, fishing, swimming, and other water activities when managed carefully.

A comprehensive Diagnostic/Feasibility Study completed in 2010 for the Simonton Lake Homeowners Association found that the lake’s overall water quality was “much better than most of Indiana’s lakes.” The study classified it as mesotrophic—meaning moderate productivity with balanced nutrients rather than the high-nutrient, algae-prone eutrophic condition common in many Midwestern lakes. Total phosphorus concentrations had declined steadily from a mean of 0.055 mg/L in 1988 to under 0.030 mg/L by 2010. Chlorophyll-a levels (an indicator of algal biomass) were low, and Secchi disk transparency readings ranged from about 6.2 to 8.5 feet during surveys.

The lake is strongly phosphorus-limited, so controlling phosphorus inputs is key to preventing excessive algae growth. Surface runoff into the lake is relatively limited, which helps keep external nutrient loading lower than in lakes with large agricultural or urban watersheds. However, local sources—such as fertilizer from lakeside lawns, pet waste, and sediment disturbance from heavy boat traffic—remain important management concerns. Deep portions of the west basin can become low in oxygen during summer stratification, a common trait in many stratified lakes.

More recent state data support a similar picture. In Indiana’s 2026 Integrated Water Monitoring and Assessment Report, Simonton Lake is listed as mesotrophic based on Carlson Trophic State Index scores (chlorophyll-a TSI of 49, with supporting phosphorus and Secchi values). Its trend is described as fluctuating. Clarity readings around 6–7 feet continue to appear in recent summaries, consistent with earlier findings.
Bacterial monitoring through the Greater Elkhart County Stormwater Partnership has shown Simonton Lake among the sites with lower E. coli levels compared with nearby streams and creeks, which is favorable for recreational contact. Blue-green algae (cyanobacteria) have been the dominant phytoplankton group in past sampling, though overall densities remained relatively low and did not trigger widespread nuisance conditions
 in the available reports.

Local stewardship plays a significant role. The Simonton Lake Conservancy and homeowners association monitor water quality, address drainage and vegetation issues, and support efforts such as weed management and shoreline practices that help protect the lake. Residents and visitors are encouraged to minimize fertilizer use near the water, properly dispose of waste, and operate boats responsibly to reduce sediment resuspension.

​In summary, Simonton Lake’s water is generally clean enough for typical recreational uses and ranks favorably against many Indiana lakes. It is not oligotrophic (ultra-clear and nutrient-poor), and ongoing vigilance against nutrient inputs is essential to maintain its current status. For the most current conditions—especially regarding algae or bacteria—check local HOA updates, Indiana Department of Environmental Management resources, or recent water testing results before swimming or allowing pets in the water. With continued community care, Simonton Lake can remain a valued recreational resource for Elkhart and surrounding areas.