wastewater – Enviro Updates

Seismic retrofit, repairs planned at regional wastewater treatment plant

February 17, 2025

Paulina Pineda, PRESS DEMOCRAT

Improvements are planned at the regional Laguna Wastewater Treatment Plant serving Santa Rosa and other cities to reduce risks of failure during an earthquake and repair other damage at the aging facility.

The repairs are planned within the headworks facility, the plant’s so-called workhorse where raw sewage is first collected and pretreated before it flows through the rest of the facility.

A city-funded study of the facility’s seismic loading and structural condition found significant deficiencies.

Gases emitted during the treatment process also have led concrete and metallic components of the facility to crack and corrode, said Tetyana Mokvyts, a water reuse engineer with Santa Rosa Water.

WaterLaguna de Santa Rosa, Laguna Wastewater Treatment Plant, Santa Rosa, sewage, The Geysers, wastewater, wastewater treatment

Balancing protein in your diet could improve water quality

July 7, 2022

Kat Kerlin, UC DAVIS NEWS

Eating Too Much Protein Adds to Nitrogen Pollution in U.S. Waters

…when a body takes in more protein than it needs, excess amino acids break it down into nitrogen, which is excreted mostly through urine and released through the wastewater system. This brings additional nitrogen into waterways, which can result in toxic algal blooms, oxygen-starved “dead zones” and polluted drinking water.

Balancing how much protein you eat with the amount your body needs could reduce nitrogen releases to aquatic systems in the U.S. by 12% and overall nitrogen losses to air and water by 4%, according to a study from the University of California, Davis.

Protein consumption in the United States, from both plant and animal sources, ranks among the highest in the world. The study, published in the journal Frontiers in Ecology and the Environment, said that if Americans ate protein at recommended amounts, projected nitrogen excretion rates in 2055 would be 27% less than they are today despite population growth.

The study is the first to estimate how much protein consumption contributes to excess nitrogen in the environment through human waste. It also indicates that coastal cities have the largest potential to reduce nitrogen excretions headed for their watersheds.

“It turns out that many of us don’t need as much protein as we eat, and that has repercussions for our health and aquatic ecosystems,” said lead author Maya Almaraz, a research affiliate with the UC Davis Institute of the Environment. “If we could reduce that to an amount appropriate to our health, we could better protect our environmental resources.”

Agriculture/Food System, Sustainable Living, Wateralgal blooms, meat, wastewater, water pollution, water quality

California to impose first statewide rules for winery wastewater, marking new era

January 22, 2021

Tyler Silvy, THE PRESS DEMOCRAT

Hundreds of California wineries will for the first time be governed by statewide wastewater processing rules, a change from the long-held, regional approach that could increase production costs for wineries and protections for waterways while providing consistency for vintners across the state.

The move toward a statewide regulatory framework, a five-year effort championed by industry leaders, was finalized this week by the State Water Resources Control Board, which approved an order setting up guidelines for wastewater processing at most of the more than 3,600 bonded wineries in the state.

The new order promises to bring at least 1,500 of those wineries into a regulatory framework for wastewater disposal for the first time, leading to extra compliance costs. But it also provides flexibility for how, and when, those wineries will be subject to rules meant to safeguard waterways and groundwater from harmful contaminants, including excess nitrogen, salinity and other compounds that deplete oxygen levels.

“I think it was the perfect example of a compromise,” said Don McEnhill, head of the Sonoma County-based group Russian Riverkeeper.

Agriculture/Food System, Waterwastewater, wastewater discharge, water pollution, wine industry, wineries

Occidental, home of sky-high sewage rates, eyes outlet in Graton, but some residents object

January 29, 2020

Guy Kovner, THE PRESS DEMOCRAT

Two Italian-style restaurants have drawn generations of diners to Occidental while serving pasta, pizza and soup — in recent years under the burden of the steepest sewage treatment rates in Sonoma County and among the highest in California.

Negri’s Original Italian Restaurant and the Union Hotel, both run by local families, pay about $120,000 a year in wastewater fees included in their property tax bills, shouldering much of the cost in a west county sanitation district that serves about 100 properties.

“You gotta sell a lot of ravioli to pay for that,” said Al Negri, former operator of his family’s eatery, established in 1943. “It would be fantastic if we got some relief.”

There could be some help coming from Graton, about 6 miles to the east with an underutilized wastewater plant that would profit from handling Occidental’s output of 18,000 gallons of sewage a day.

But there’s a catch: Graton’s plant is on a wooded 20-acre site north of the town with no road access, and finding a place to connect with the community’s sewer system has proved elusive. Neighborhood protests thwarted so many attempts to deal with Occidental’s wastewater that officials resorted two years ago to trucking it to a plant in an industrial area next to the county airport.

Residents of the 53-unit Blue Spruce Mobilehome Lodge on Green Valley Road in Sebastopol mobilized quickly after learning of the Graton Community Service District’s plan to build a wastewater receiving station 3 feet from the entrance to their park and 20 feet from the nearest mobile home, occupied by a 100-year-old woman and her son-in-law.

Graton’s plan calls for pumping six truckloads of untreated sewage a day into a valve on a concrete pad at the edge of a gas station at the corner of Green Valley Road and Highway 116.

A petition signed by 53 residents, some from the same family, objected to the project, and 15 people attended a Graton district board meeting last week, complaining about lack of advance notice of the project and objecting to the potential noise, traffic and odor.

Land Use, Sustainable LivingGraton, Occidental, sewer systems, wastewater, wastewater treatment

Santa Rosa wastewater quandary linked to Kincade fire could get worse as rainy season ramps up

January 3, 2020

Will Schmitt, THE PRESS DEMOCRAT

Nearly two months after the Kincade fire was fully contained in northeastern Sonoma County, Santa Rosa is struggling with an after-effect of the massive blaze: its wastewater disposal pipeline at The Geysers was disabled for six weeks, backing up the Sebastopol-area plant with about 400 million gallons of treated wastewater.

As a result, by February city water officials anticipate nearing maximum capacity at the plant’s storage ponds, forcing them to release treated effluent into the nearby Laguna de Santa Rosa, a step that would put customers on the hook for an estimated $400,000 in environmental charges.

The wastewater quandary is one of the lingering repercussions of the county’s largest ever wildfire, which scorched about 77,000 acres and more than 170 homes after igniting near a faulty PG&E transmission line in late October.

A clearer picture of its impact on The Geysers geothermal field — the complex of power plants near where the fire erupted — and the city’s wastewater system, which sends most of its recycled daily output to The Geysers, emerged over the past several weeks in public records and in interviews with city water staff and representatives of PG&E and Calpine, which operates most of the power plants.

PG&E has restored power to most of the lines that went down due to the Kincade fire, but it is still weeks away from reactivating the transmission line where equipment broke shortly before the start of the wildfire, a PG&E spokeswoman said.

That same high-voltage line previously powered the city-owned pumps that deliver water about 40 miles from Santa Rosa’s Laguna Wastewater Plant to The Geysers as part of the city’s wastewater disposal system, in operation since 2003.

Without electricity from that line, Santa Rosa found itself sidelined for six weeks — without the ability to pump the 15 million gallons of wastewater it regularly sends per day on average to help sustain steam power at The Geysers, said Joe Schwall, the city’s deputy director of water reuse operations. The Laguna Road plant is one of the largest sewer operations in the North Bay, serving more than 200,000 people not just in Santa Rosa but in Rohnert Park, Cotati, Sebastopol and parts of Sonoma County.

Climate Change & Energy, WaterCalpine, fire damage, Geysers pipeline, Kincade Fire, PG&E, wastewater, wastewater overflow

Septic systems Total Maximum Daily Load (TMDL): How this rule impacts us

July 13, 2019

Vesta Copestakes, SONOMA COUNTY GAZETTE

In mid-June, the Sonoma County Board of Supervisors took action to meet State mandated septic system regulations that protect water quality and public health.

“Our Local Agency Management Program balances state regulations with local septic policy,” said Board Chair David Rabbitt. “In some areas we are providing more flexibility to homeowners. For example, the new policy no longer requires septic system review for certain building improvements to existing structures.”

Community education and engagement was a central component of the regulation update process. The County hosted six community meetings, met with numerous community associations, welcomed comments in person and online, and provided materials to educate people on the process and technical details.

This has been a VERY long process with community meetings going back decades, yet STILL the problem remains complicated for homeowners from the headwaters of the Russian River, all the way throughout the watershed out to the sea. The estimate is that 18,000 homes will have to comply, so you can see this could take a while!

A central component of Sonoma County’s Local Agency Management Program is the County’s updated Onsite Waste TreatmentSystems (OWTS) Manual. This manual provides the regulations, procedural and technical details governing individual onsite wastewater treatment systems (also referred to as septic systems). The four main changes to local septic requirements relate to:

• Repairs, replacement systems, and new systems;

• Qualified consultants and OWTS designers; and

• Building permit thresholds for septic system review.

The approved changes to the OWTS Manual takes effect July 1, 2019, but it could be another five years before all systems are in place to clean up the problem that impacts water quality along the Russian River and all tributaries leading to the river.

TMDL stands for Total Maximum Daily Load

What that means is how much human waste can the river handle before it becomes toxic for fish, wildlife and humans.

People always bring up that not only human waste ends up in the river, but what they may not know is that human waste is easily differentiated from animal waste, and it’s the human waste that poses the problem.
What’s the major contributor of human waste?

OWTS – Onsite Wastewater Treatment Systems. They are not always SEPTIC systems (a tank that pretreats/decomposes water and waste before the water enters a leach system which disperses the wastewater into soil). They are also often Cesspools (a box that leaches waste into the soil without treatment).
Options to cesspools and septic systems are available…

Sewer systems – complicated and too expensive for small, rural communities).

Sustainable Living, Waterseptic systems, TMDLs, wastewater, wastewater treatment

Occidental has a big wastewater dilemma to resolve

May 31, 2019

Tom Gogola, THE BOHEMIAN

New rate increases for the Occidental Sanitation District underscore an old problem: the West County outpost is a small and underfunded district that has no wastewater disposal system of its own.

The Sonoma County Water Agency recently announced that it had approved routine rate increases for eight districts and zones that provide sewer service to more than 18,000 properties throughout the county. In a release, it says the increases will pay for maintenance and operations, and for $50 million in capital improvements to sewer collection and treatment centers in the affected districts.

None of the capital improvements are coming to Occidental, however, which has faced a wastewater-removal conundrum for two decades.

Among the proposed uses of the new revenue coming from consumers and businesses: The Geyserville district will get new aerators at its wastewater treatment facility; there’s proposed funding for a flood resiliency project in Penngrove; sewer-main projects are planned for Sonoma Valley and the Airport/Larkfield/Wikiup zone; and other improvements are afoot in the Russian River and South Park districts.

The districts’ rates are being increased from between 3.5 and 5 percent which, in and of itself, is neither controversial nor widely opposed by the impacted ratepayers, says SCWA principal programs specialist Barry Dugan. California’s Proposition 218 requires public notification and explanations behind proposed rate hikes such as the ones approved by the SCWA board last week. If more than 50 percent of respondents reject the new rate, it doesn’t pass. Fewer than 2 percent of 18,0000 impacted citizens wrote in to protest the new rate.

A review of the breakout of opponents doesn’t show any one district or another having outsized levels of opposition to the new rates. Indeed, as Dugan points out in an interview, there’s almost exactly the same number of opponents to this year’s increase (217) to last year’s (216).

If there’s any controversy it’s with Occidental’s chronic wastewater conundrum and what to do about it. A handful of Occidental resident disapproved of the rate increases, in a town that’s in a uniquely tough spot when it comes to wastewater removal: It’s a very small district with only 100 ratepayers that’s been underfunded for years, says Dugan, and that pays among the highest sanitation rates of any district in the state—if not the highest rate, suggests Dugan.

Waterwastewater, wastewater discharge, wastewater overflow