Idaho
An inside look at Idaho’s $3M fight against invasive quagga mussels
Jeremey Varley, the Idaho State Department of Agriculture’s southern chief treatment engineer, explains the state’s strategy for eradicating invasive quagga mussels during a boat tour of the infested portion of the Snake River on Oct. 3, 2025.
Clark Corbin / Idaho Capital Sun
Now in its third year, the effort to rid Idaho’s Snake River of invasive quagga mussels is a near 24/7 operation taking place both on the water and in a nearby laboratory.
Since Sept. 30, a team of about 25 Idaho State Department of Agriculture staff members and another 15-20 contractors have been applying a copper-based chemical called Natrix to every nook and cranny of a 3.5-mile section of the Snake River, as well as injecting the chemical into some of the underwater pools of the Snake River.
Not only is the Snake River the longest river in Idaho and a source of irrigation and drinking water, but it is also a major tributary of the Columbia River, which empties into the Pacific Ocean.
State officials’ goals are to stop the mussels from spreading beyond the infested area into other parts of the river system and to completely eradicate all of the mussels that have been detected here so far.
“We’re throwing everything at it as if this is the last time we would ever have to, want to or be able to do a treatment,” Idaho State Department of Agriculture Deputy Director Lloyd Knight said.
Quagga mussels were first discovered in Idaho in 2023
Quagga mussels are a nonnative, invasive species that was first detected in water samples taken from the Snake River near Twin Falls in September 2023.
Officials again identified quagga mussels in some of the same parts of the river in 2024 and again this September, although officials said the area of the Snake River infested with mussels has decreased from 7.2 miles of river in 2024 down to 3.5 miles of river this year.
Sgt. Pam Taylor of the Washington Dept. of Fish and Wildlife displays invasive quagga mussels during a demonstration of a boat inspection for reporters, Tuesday, Feb. 25, 2020, at a boat launch in Olympia, Wash.
Ted S. Warren / AP
Idaho State Department of Agriculture officials said one breeding pair of adult quagga mussels can produce more than 1 million offspring in one year — reproducing so fast they threaten irrigation, drinking water, agriculture and recreation. Infestations of quagga mussels can clog pipes used for irrigation or drinking water and damage dams or boats, officials said.
Additionally, quagga mussels are filter feeders, and they can disrupt the food web by taking up a huge chunk of the food and nutrients that native species are competing for, officials said.
“That’s why it’s important we throw everything we can at trying to eradicate these things,” Knight said.
Knight estimated this year’s treatment plan could cost $2.5 million to $3 million.
But Idaho State Department of Agriculture Director Chanel Tewalt said the department is not asking for any additional state general fund money to fight the mussels at this time. Between $6.6 million that state legislators approved to fight quagga mussels in 2024 to funding taken from the sale of invasive species stickers, Tewalt said the department is not seeking additional general fund money.
What does Idaho’s plan to kill the quagga mussels look like?
The infestation of quagga mussels appears to be limited to the stretch of the Snake River right around Shoshone Falls, a large scenic waterfall that is higher than Niagara Falls.
In early October, the Idaho State Department of Agriculture invited the Idaho Capital Sun and other reporters from around Idaho to observe the treatment program and tour the infested portion of the Snake River by boat.
In an effort to completely kill all of the quagga mussels, contractors are applying a copper-based chemical called Natrix in concentrations of one part per million to the Snake River.
The copper is designed to flow over the quagga mussels’ gills, suffocating and killing the mussels, Knight said.
The copper chemical also suffocates and kills fish and other aquatic life with gills, officials said, though some species of fish and aquatic life appear resistant to the copper.
Officials said they have seen fish killed this year by the copper treatment, but not as many as were killed during the first year of treatment in 2023, when tons of fish died and floated to the surface of the Snake River.
“There is some additional take that occurs on other organisms (besides the mussels that are targeted), but the nice thing about this river run environment is there’s a good, healthy populations (of aquatic life) upriver from where our treatment area is and we expect rehabilitation to occur (after treatment ends),” said Jeremey Varley, southern chief treatment engineer for the Idaho State Department of Agriculture.
This year, crews are using some tools and equipment that has been commonly used in irrigation systems in an attempt to apply the copper chemical to hard-to-reach parts of the Snake River.
Gravity boxes attached to canyon walls above shore help mix river water with the copper chemical near the surface of the water.
And new this year, Varley, who is a certified scuba diver, rigged a new system that uses buoys, a diaphragm pump and a manifold to pump the copper chemical into pools of water 20 feet below the surface of the river to target mussels below the water.
To connect and rig the system, Varley donned a full wet suit and dove down under water, where the visibility was less than 5 feet and water temperatures were a chilly 62 degrees.
“That’s something that Jeremey came up with,” Knight said. “It’s something that is very unique to here. Nobody else has tried it anywhere else.”
Knight said the Natrix treatment being applied to the Snake River is the largest treatment of its kind in the United States and has never been attempted at such a large scale anywhere else in the U.S.
Latest water samples show copper chemical is killing quagga mussels
Meanwhile, as contractors are applying the copper chemical, crews are also collecting water samples in the same stretch of the Snake River. The samples are stored on ice and analyzed in a Idaho State Department of Agriculture lab located at College of Southern Idaho in Twin Falls.
On Friday, Michelle Jakaitis, the principle microbiologist for the bacteriology and parasitology lab at the state’s animal health lab, said she had not seen any live quagga mussels in water samples since the treatment program began Tuesday.
“Since treatment has occurred, we have seen much fewer (quagga mussel) veligers, and all of them have been dead, which is exactly what we expect, and we’re very glad,” Jakaitis said Friday.
Scientists and technicians use microscopes to study water samples taken from the Snake River to detect invasive quagga mussels in this undated photo.
Clark Corbin / Idaho Capital Sun
During the treatment program Jakaitis and the team at the lab are using microscopes to analyze water samples from 10 a.m. until 8:30 p.m. each day.
“It is quite a time commitment, but it is very important, and it has been very useful and informing (us) that the treatment is doing exactly what we’re expecting it to do,” Jakaitis said.
It may be too early to tell if the treatment was totally effective.
Following previous years’ rounds of treatment, crews did not detect the quagga mussels in samples taken earlier this year and during the early summer months of 2024.
But officials did detect the mussels again in early September in 2024 and 2025.
Knight said the department’s crews will continue sampling and testing the water for five more years to continue to monitor for the invasive mussels.
Although all Idaho state departments and agencies other than public schools are having to implement budget holdbacks of 3% to cover for state revenue shortfalls, Knight said the Idaho State Department of Agriculture officials decided to prioritize the quagga mussels response and are cutting other areas instead.
“No, this is obviously a priority that we are throwing everybody and everything at,” Knight said.
Idaho Capital Sun is part of States Newsroom, the nation’s largest state-focused nonprofit news organization.
This republished story is part of OPB’s broader effort to ensure that everyone in our region has access to quality journalism that informs, entertains and enriches their lives. To learn more, visit opb.org/partnerships.
Idaho
Idaho angler reels in record 43.25-inch lake trout at Payette Lake
MISSOULA, Mont. — An Idaho Falls angler is back in the Idaho record books after landing a record-setting lake trout at Payette Lake.
Idaho Fish and Game said Dylan Smith caught and released a 43.25-inch lake trout on May 2, setting a new state catch-and-release record for the species. The fish surpassed the previous record of 42 inches.
The catch marks Smith’s second appearance in Idaho’s record books. He previously held the state catch-and-release lake trout record after landing a trophy fish in 2018 before that mark was later broken.
According to Fish and Game, Payette Lake has become one of Idaho’s premier lake trout fisheries thanks to years of management efforts aimed at improving both lake trout and kokanee populations.
Idaho
Boise’s North End finds new way to mark Pride after Idaho law halts flag display
Pride Month looks different this June along Boise’s Harrison Boulevard, where a long-standing tradition of hanging Pride flags on lamp posts has been put on hold after a new state law restricted which flags can be flown on government property.
For several years, Pride flags lined lamp posts along Harrison Boulevard in Boise’s North End neighborhood. But Idaho House Bill 561, signed by Gov. Brad Little in March, restricts which flags can be flown on government property, including the City of Boise’s Harrison lamp posts.
In response, a group of neighbors formed Pride North End and launched a distribution effort to help residents show support from their own front yards. The group has been making Pride flags and yard signs available to people who want to display them at home.
“I thought that I would…be a personal example of ‘yes, this is what I do.’ This is what I believe in,” said Edna Schochat, a North End resident.
Pride North End has already distributed more than 900-yard signs and 250 flags. The group’s original donation goal was around $2,000 to order 100 flags and 200 yard signs, but it has exceeded that GoFundMe goal, reaching $10,000 worth of donations.
The group plans to continue holding public flag and sign distributions through the end of the month.
“We cannot just say something without doing something that proves that we mean what we say,” Schochat said.
Pride North End said any leftover funds after materials are distributed will go to local LGBTQ+ nonprofits. A link to the group’s GoFundMe can be found here.
Idaho
New Idaho education laws: What students, parents and educators should know
July 1 isn’t just the start of a new fiscal year for Idaho public schools. It’s also the effective date for many new education-related laws.
From mandatory moments of silence to restrictions on taxpayer funding for teachers’ unions, the Legislature enacted a slew of new policies affecting public schools during this year’s session.
Here’s what educators, parents and students should know:
School trustees, administrators and teachers
Here are the new laws that will affect school trustees, administrators and teachers:
Union activities. Public schools can no longer use taxpayer resources to accommodate teachers’ unions — including by giving teachers paid time off for union “activities” or by using payroll systems to deduct union dues.
The list of union “activities” in House Bill 516 is long. Among other things, it includes:
- Supporting or opposing candidates for office
- Influencing legislation
- Promoting union membership
- Participating in the “administration business or internal governance” of a teachers’ union
- Preparing, conducting or attending a union event
- Distributing union communications
- Speaking on the union’s behalf
- Engaging in union negotiations
- Filing a grievance on behalf of the union
A school district can’t give teachers paid time off to participate in these activities, unless the union reimburses the district.
HB 516 was based on a report from the Washington-based Freedom Foundation, an anti-union think tank, which alleged that public schools have spent more than $1 million subsidizing teachers’ unions.
The bill also prohibited districts from:
- Deducting union dues through payroll systems.
- Increasing teacher pay to cover union dues.
- Requiring that teachers meet with the union.
- Sharing employees’ contact information with the union.
- Communicating on the union’s behalf.
Civics instruction. Public schools must now ensure that their civics instruction aligns with a law aimed at cultivating the “virtue and knowledge necessary for self-government.”
Senate Bill 1336 codified nearly four pages of requirements for civics instruction. By the time public school students graduate, they must exemplify the virtues of “prudence, justice, fortitude, moderation and patriotism” while understanding the “fundamental principles of the nation’s republican form of government” along with the “history, meaning, significance, and effect of key historical documents.”
Click here to read the list of principles and texts that students must understand.
The bill also required that high school students complete two credits in American history and two credits in American government. These classes must include instruction on the American Revolution and founding along with instruction on the incompatibility of totalitarianism with the principles of American government.
The bill also “encouraged” public schools to display historical portraits of George Washington “in a conspicuous place” in each classroom where civics is taught.
Public charter schools can request an exemption from many of the new requirements. Traditional public schools cannot.
Lastly, the bill pushed back the implementation date for a new civics test that the Idaho Department of Education is writing. The new test will be required in 2027-28, rather than during the upcoming school year.
High-needs funding. Public schools are now eligible to receive up to $100,000 in state funding for “high-needs” special education students.
Senate Bill 1288 set aside $5 million for students who require full-time staff support or specialized equipment. Districts can apply for the state funds to cover students whose individual education program-related costs exceed $30,000 annually.
The state will fully reimburse costs between $30,000 and $80,000. Costs above $80,000 will be reimbursed at 80%, and reimbursement is capped at $100,000. Forty percent of the state funds are reserved for rural schools.
Sexual abuse reporting. School districts are no longer allowed to conduct an internal investigation of abuse in lieu of reporting an incident to law enforcement.
Sen. Tammy Nichols, R-Middleton, proposed the law in response to sexual abuse complaints against Gavin Snow, a former special education assistant in the Boise School District.
Senate Bill 1412, which passed with unanimous support, also requires that school districts ask job applicants for sworn statements disclosing pending or prior investigations, resignations during investigations or disciplinary action stemming from misconduct. An applicant who lies in the disclosure is no longer eligible for the job.
Funding flexibility. Public school districts and charter schools are now eligible for flexibility in how they spend state funds — if they meet performance benchmarks.
To qualify for the “earned autonomy,” districts would have to post high marks on test scores and graduation rates while charters would be graded on academics and financials.
House Bill 883’s sponsors estimated that about 10 districts and 15 charters would qualify.
Parents
Here are the new laws that parents should be aware of:
Social transition reporting. Parents will now have a right to be notified if their child identifies as a different gender at school. Schools could face a six-figure penalty for failing to comply.
House Bill 822 requires that public school officials notify parents within 72 hours if their child requests help with “social transitioning.” This includes when a student asks to go by a different pronoun or use a bathroom or participate on a sports team that doesn’t align with their birth sex.
Sponsored by Rep. Bruce Skaug, R-Nampa, the law gives parents the right to sue a school or healthcare provider for relief and monetary damages if they aren’t notified within the 72-hour window.
The attorney general can also seek a civil penalty up to $100,000.
Rep. Bruce Skaug, R-Nampa
Virtual school policy. Parents of virtual-school students will have new restrictions on money they receive to cover the costs of home learning.
After a state report last year found examples of taxpayer money being misused, lawmakers added limits on “supplemental learning funds.” According to House Bill 624, this money can only be spent on “eligible educational expenses, including:
- Computer hardware, internet access or other devices used to meet a student’s educational needs.
- Textbooks, curricula or other instructional materials, including educational software.
- Fees for standardized tests, advanced placement exams, certificate exams or college admissions exams.
- Therapies, including behavioral, physical, speech-language and audiology therapies, along with other State Board of Education-approved services.
In addition to the rules around supplemental learning funds, HB 624 added reporting requirements for private vendors that contract with virtual schools. Vendors must disclose the costs and services they provide while demonstrating a “clear relationship between the public funds received and the services provided.”
Military preference on charter waitlists. Active-duty military parents could be eligible for preference on charter school waitlists.
Lawmakers passed a bill that allows charter schools to place children from military families third among categories of students given preference on waitlists. It’s up to each charter school whether they implement the change.
Students
Here are the new laws that students should know about:
Moment of silence. Public school students will now have to start each school day with a moment of silence.
They can use the 60 seconds however they want — to reflect, meditate or pray — but they must be silent, and “no other activities shall take place,” according to House Bill 623.
Sponsored by Rep. Bruce Skaug, R-Nampa, the law requires that a moment of silence occur “at or near the beginning of each school day.” It prohibits teachers from instructing students on the “nature of any reflection” they might engage in.
School leaders also must notify parents about the moment of silence and “encourage” them to “provide guidance” to their children on how to use it, according to the law.
Idaho Launch cuts. Less state aid will be available for students going to college after they graduate in 2027.
For the current fiscal year and next fiscal year starting July 1, state lawmakers — with Gov. Brad Little’s approval — cut $10 million from Idaho Launch. The program offers high school graduates $8,000 to spend on an in-state higher education degree or workforce training certificate.
While the award amounts will remain the same, the state now has $65 million in scholarship money to dole out, compared to $75 million in previous years.
IDLA cuts. Fewer students are eligible to take discounted courses through the state’s online learning platform, the Idaho Digital Learning Alliance (IDLA).
House Bill 940 cut funding for IDLA’s elementary program, limiting the platform to students in grades 6-12. The bill also cut driver’s education, and eliminated state funding for students attending all-virtual schools and non-public schools — although private- and home-schoolers can pay IDLA’s full course fee and seek reimbursement through the Parental Choice Tax Credit.
HB 940 also set new fees for courses that are eligible for state funding. Courses that satisfy a graduation requirement are $40, while courses that don’t meet a graduation requirement are $100.
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