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Swim Guide

August 25, 2022

Is it safe to swim here?

That’s one of the most common questions Riverkeepers get during the summer. To help answer that question, Catawba Riverkeeper operates a summer Swim Guide program to test popular swimming areas on local lakes.


Swim Guide is an international program used by Riverkeepers and other advocates to provide up-to-date recreational water quality data for beaches, lakes, and rivers around the world. Catawba Riverkeeper piloted the program on Lake Wylie in 2019. By 2021, we had expanded the program to 58 sites on the 5 other major lakes – Lake James, Lake Hickory, Lake Norman, Mountain Island Lake, and Lake Wateree – in addition to Lake Wylie.

How does it work?

Riverkeeper staff, interns, and volunteers collect samples on Thursday mornings, which are tested for E. coli in the Riverkeeper’s in-house lab. Results are posted on Fridays in a stoplight system (green, yellow, red), so that you can make informed decisions about swimming over the weekend.


Contact lauren.h@catawbariverkeeper.org to learn how you can volunteer!

Why test for E. coli?

Recreational standards usually focus on indicator bacteria, which are used to detect the level of fecal contamination in the water. E.Coli is considered a better indicator of human sewage than other types of bacteria because they are found in intestines of warm blooded animals. E. coli is the type of bacteria that local health authorities look for in freshwater. Primary contact with water containing high levels of fecal bacteria and other pollutants can lead to disease, infection, and rashes.


Results are also be shared on the national Swim Guide map and will follow a stoplight system to help you easily understand results. Locations that come back with high amounts of E. coli will be marked red.

We’re looking for volunteers to drive their boats to designated spots each week. All supplies will be provided and gas will be reimbursed by Catawba Riverkeeper. Learn more and email lauren.h@catawbariverkeeper.org if you’re interested.

Sponsor a site or a lake or river!

Site sponsorships are $500 and cover the cost of materials required to collect samples and run tests weekly for each site. Lake sponsorships are $5,000 and cover the personnel expenses incurred by staff and interns for time and mileage. Select your site or lake by typing in the name of the site or lake after you hit “donate once” on the main giving page. Sponsorship requests are granted on a first come, first served basis. Sites must be chosen from the list of sites on the Swim Guide webpage.

See the sponsored and available sites and lakes or rivers on the map below. We’ll update the map as new sponsors sign up.

Lake or River Segments for Sponsorship

  • Lake James
  • Lake Rhodhiss
  • Lake Hickory
  • Lake Norman
  • Mountain Island Lake
  • South Fork River
  • Lake Wylie – Sponsored by the Borman Family
  • Free flowing Catawba below Lake Wylie Dam
  • Lake Wateree

The Riverkeeper’s sample data provides a general guide to the health of the waterway and should only be used for informational purposes. This data does not guarantee the sampled area is safe for swimming at all times. Overall, E. coli levels in the Catawba lakes are low, and the reservoirs are typically safe for swimming. However, E. coli levels can change at any time & increase after rain events. As a general rule, if the water is clear, then E. coli levels are likely to be low.

February 5, 2025
Northern basin lab becomes first state-certified non-profit macroinvertebrate sampling lab in North Carolina
By Ellie Riggs January 17, 2025
On January 8th, the Policy Team traveled to Raleigh to kick off the 2025-2026 Legislative Session and celebrate the swearing-in of North Carolina’s 170 new lawmakers. Just a week later, South Carolina’s 126th General Assembly convened in Columbia. Congratulations to all the new legislators! We are excited to work with you to protect the waters of the Catawba-Wateree River. Before we dive into the details of our advocacy work this year, let’s take a step back to your middle school civics class. What exactly is a General Assembly? What is a legislative session? And how does an idea become a law? In both North and South Carolina, the General Assembly is the government body responsible for making state laws. It’s divided into two chambers: the House of Representatives and the Senate. Each member of the General Assembly is elected for a two-year term to represent the constituents from their district—including you! In January of each odd-numbered year, the new NC and SC General Assemblies convene for the first time in Raleigh and Columbia to begin their legislative sessions. During this time, legislators meet with constituents, lobbyists, government staff, and each other to discuss issues and solutions, introduce bills (drafted proposals for new laws), and vote on legislation. The goal of a legislative session is to create and pass laws that address state needs and shape the future of our communities. In NC, the General Assembly meets on a biennial schedule, with a “Long Session” from January to August of odd-numbered years and a “Short Session” in May of even-numbered years to adjust the budget. SC’s General Assembly convenes annually from January to May. So, how does a bill become a law? The process begins when a concerned citizen or advocacy group, like Catawba Riverkeeper, presents an idea to a legislator. If the idea gains support, it’s drafted into a bill and introduced into one chamber, where it’s debated and refined by a committee. If the bill passes the first chamber (in NC, this must happen before May 9th of the Long Session), the process repeats in the second. Once both chambers approve the bill, the governor can sign it into law. However, it’s rarely as simple as the Schoolhouse Rock “I’m Just a Bill” song suggests. Proposing a bill requires a tremendous amount of work, including extensive background research, numerous meetings with legislators, and meticulous conversations and email exchanges to fine-tune the text. Even after this, the bill can face delays, revisions in committee, or a veto from the governor. No wonder “Bill” from “I’m Just a Bill” looks so worn out! There is still one crucial step in the process that Schoolhouse Rock left out, and it involves YOU! As a constituent, your voice can directly influence laws that impact your life. Legislators derive their power from the people they represent, and their decisions are shaped by your concerns. Urging your Senator and Representative to support bills that matter to you is a powerful way to help pass legislation. It’s easy to do! Visit ncleg.gov or scstatehouse.gov to find your lawmakers’ contact information. You can email them to express your support for bills you care about. These websites also let you track the progress of bills as they move through the legislative process. Despite the challenges and complexity of the legislative process, advocating for our river is a central part of Catawba Riverkeeper. Every piece of our 2025-2026 Legislative Agenda and every bill we support has the potential to make meaningful impact on the health of our streams, rivers, lakes, and communities. Advocacy is also a team effort. While the Policy Team is brainstorming new ways to address stormwater runoff, meeting with legislators to discuss the importance of outdoor recreation, and drafting legislation to support disaster recovery, the work of advocating for our waterways requires all our voices coming together to create positive change. We hope that you will join us in being a voice for our waters this legislative session! Visit our Advocacy Page to learn more.
December 20, 2024
Another busy year is in the books!
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