Featured Video: How Do They Replace Lead Pipes?

Replacement of lead service lines has dramatically accelerated in recent years due to increased attention on the issue and consequently, enhanced public support and funding for the effort. In this video Denver Water offers a behind-the-scenes look at the process and helps their customers understand what they need to do before, during, and after work in their area.

Operator Educates Millions on TikTok

This wastewater treatment plant operator has gained millions of views on TikTok after posting numerous informational videos on various wastewater topics. His most viewed video on where toilet water goes when you flush gained 12.2 million views. In some of his other videos, he shows behind the scenes at a wastewater treatment plant and what the inside of a manhole actually looks like. 

This operator is doing a good job at educating the public and specifically young people about wastewater. Wastewater operations make everyday life possible and it's great that more people are interested in what's going on behind the scenes. You can check out this operator on TikTok @waterbearops.

Do you know of any other TikTok accounts from operators? Let us know! 

The Next Generation of Water Workers

The value of clean, safe water (and the essential water workers who provide it) has been in the spotlight during the COVID-19 pandemic. However, according to a report from the Brookings Institution, approximately 3 million workers will need to be replaced within the next decade. Who will be the next generation of water workers? This is a question that the American Public Works Association and many others are thinking about as the current water workforce heads toward retirement. 

Various entities such as the U.S. Environmental Protection Agency (EPA), the American Public Works Association, and Congress have all been working to tackle this important issue. The U.S. EPA announced its America’s Water Workforce Initiative late last year, using education programs and public outreach to help develop water as a career of choice.

Other organizations like the American Water Works Association and the Water Environment Federation have also been working to tackle this issue. The two collaborated to create the Work for Water website, which has been recently updated, to serve as a fantastic resource to find jobs and prepare individuals for water related careers.    

AWIA Section 2013 Compliance Check

Small community drinking water systems (CWSs) that serve between 3,301 and 49,999 must submit Risk and Resilience Assessment (RRA) certifications by June 30, 2021 and an Emergency Response Plan (ERP) by December 21, 2021 in order to stay in compliance with America’s Water Infrastructure Act (AWIA). Certification must be completed every five years and the ERP updated within six months of that recertification. You can confirm if your water system is impacted by the AWIA on the U.S. EPA website. 

In this era of unpredictability, it is increasingly important to adapt water systems to the ever changing and intensifying events that threats like climate change pose. Building a strong water resilience plan is the best way to prepare yourself and your community against these events. In order to stay ahead of the game, utilities should conduct an assessment to reduce risk, plan for and practice responding to emergencies, and monitor systems for contaminants. 

The AWIA does not require utilities to use any specific tools or methods when conducting these assessments. It does however require utilities to meet all requirements listed in Section 2013 and throughout the act. The U.S. EPA also has more information on how to certify your risk and resilience assessment and your emergency response plan. There is also more information on our website about how to complete your RRA and ERP, as well as information about the AWIA Small Systems Certificate Program.

Florida Security Incident Highlights Need for Cybersecurity Precautions

Oldsmar, Florida made national headlines after experiencing a remote breach of their chemical control system earlier this year.

The hacker, whose identity and intent has not yet been identified, increased the sodium hydroxide feed by more than 100-fold, but the change was quickly overridden by the operator who saw the breach occur. The operator then disabled remote access and contacted local authorities.

This technical brief from the U.S. Department of Homeland Security (shared via Michigan WEA) provides an in-depth overview of incident as well as potential broader impacts, including attacks inspired by the methods used in Oldsmar.

This is just the most recent example of hackers exploiting utility cybersecurity vulnerabilities and undoubtedly you may be wondering if your system is doing enough to prevent this type of intrusion or has the safeguards in place to respond in the event of a breach.

The U.S. EPA released a new Cybersecurity Best Practices page and we recommend the Cybersecurity Incident Action Checklist as the best place to begin your own self-assessment.

Water Operator Vaccination Update

By Margaret Golden

When the public thinks about “essential employees” they typically picture healthcare workers, first responders, or even grocery store workers. The water operators that work to keep our water safe and protect public health are also essential, currently classified in CDC’s phase 1C category for vaccine prioritization

The CDC (Centers for Disease Control and Prevention) recently hosted a webinar discussing COVID-19 vaccinations for essential workers, specially those who work in the water sector. Since the vaccine is new and currently in limited supply, the CDC created a list of “essential workers” with various levels of priority in order to ensure that those who are most vulnerable would be able to get the vaccination first. These recommended categories, including water sector professionals as phase 1C,  were developed by the CDC with help from the ACIP (Advisory Committee on Immunization Practices). These guidelines were set up by the CDC to serve as recommendations, as the ultimate timeline decision lies within your local jurisdiction.

Each state has created its own specialized action plan depending on its need for sub-prioritization. For example, areas where large outbreaks have occurred are being prioritized as well as workers with a history of illness. There are also potential exceptions to the timeline. For example, if you are someone that works in a state, county, or local jurisdiction that is different from the one where you live you might be able to get vaccinated where you work. If you are unsure about where you stand in the timeline, you should contact your local public health department.

With COVID-19 vaccines developed in record time, there is understandably some hesitation surrounding it. However, after being tested on a wide range of adults from diverse backgrounds and after being approved by the FDA (Food and Drug Administration), the CDC has determined the vaccine to be safe and effective. Two vaccines are currently available in the United States, from Pfizer-BioNTech and Moderna. The Pfizer and Moderna vaccines both use mRNA technology, meaning that the mRNA instructs the body to produce a harmless piece of the spike protein so that your body can create the antibodies to fight against them. This means that the vaccine cannot give you the virus because there is no live virus in the ingredients. You should also still get the vaccine even if you have had COVID-19 because it can still help prevent you from getting it a second time.  

As we approach the one year anniversary of the first lockdown in the United States, we are lucky to have a vaccine available to protect the workers who ensure our water is safe to drink. When it’s your turn, WaterOperator.org encourages all water sector professionals to be vaccinated to help stop the spread of this deadly virus. If you have concerns, we recommend contacting and following the advice of your local health department or personal physician.

Lastly, it is important to remember that getting vaccinated is just one of many efforts to be made; we all also need to continue to wear masks, wash hands, stay six feet apart, and avoid crowds, whether you have been vaccinated or not. 

Screens: An Important First Step in a Wastewater Treatment Plant

By Phil Vella

No matter what size wastewater treatment plant you have, screening equipment at the headworks is a necessary requirement. Screens or pretreatment devices are designed to remove or reduce large solids like wood, cloth, paper and plastics from the waste stream. This not only allows downstream treatment process to be more efficient but also protects the equipment such as pumps.

Several different types of equipment can be used to meet these objectives and there is no one-size-fits-all solution that can be applied to every headworks situation. Some of the limitations of small systems are low flows, space and financial considerations. The following will focus on those options most likely to fit into a small wastewater treatment plant. 

As with most equipment at a plant, screens come in a variety of sizes, capacity, automation and cost. In general screens may be classified as coarse, fine and micro and are based on the size of the screening openings. The discussion here will focus on course screen technology with openings 6 to 36 mm (0.25 to 1.5 in.).
 

Manual Bar Screens

With the limitations of small systems, a manual bar screen may be a great option. These screens have vertical bars approximately 1 to 2 inches apart to catch the incoming debris. Although very basic, they do provide a good level of protection for the plant. An example is shown in Figure 1. However, as with most basic equipment, there are limitations.

Source: Islamic University of Gaza.

The most obvious limitation is that this is a manual operation and requires dedicated manpower and can be a burden to small systems. This is especially true during high flow events such as storms that may require more frequent raking and may also create more of a safety hazard for the operator.

Automatic Bar Screens

To limit the labor involved with manual bar screens, there are several automated options available. These can be classified into different group types. Chain Driven Screens, Catenary Screens, Reciprocating Rakes, Continuous Belt Screen and many variations of them. A summary of different types of screens with their advantages and disadvantages is given in Table 1. These options also commonly use vertical bars to capture the solids and remove them with an automated raking system. Since these are automated, the cost and other operational costs must be considered. In addition, these systems are larger than the manual screen so adding this to a facility may require civil engineering to modify the influent channel or the headworks building if placed there. You may have reduced the labor cost but have increased the capital and infrastructure expense.

Although course screens can remove large material at the head works, disposal of this material becomes and added cost and requires operation and maintenance.  In addition, the wet screenings collected are smelly that can attract vermin and result in odor complaints from the community. 

Source: WEF, Manual of Practice 8, 2017

The following are examples of some of the screen options available to wastewater treatment plants.

Multi Rake Chain Driven Bar Screen (Automatic/Self Cleaning) | Source 

Multi Rake Automatic System

Reciprocating (Single/Basket) Rakes | Source

Catenary Bar Screen | Source

Arc Screen | Source

In summary, there is no right equipment choice for all headworks screening circumstances. Individual factors such as flow rate, solids loading, cost and infrastructure modifications must be considered. Choosing the correct option is important not only in protecting downstream equipment but also for efficient and effective solids removal resulting in proper wastewater treatment. 

Featured Video: Lift Station 2 Pump Cleaning

By Jill Wallitschek

Lift stations are designed to move sewage from a lower to higher elevation through pumps and pipes. Once pumped to a higher elevation, sewage continues to move through the collection system via gravity to reach the wastewater treatment plant. Utilities typically install one of two types of lift stations. Submersible pump lift stations, also called wet well lift stations, contain the pumps, sewage, and floats all in one vault. Dry well lift stations use two vaults to separate the pump system and wastewater. To learn more about lift station operations, components, sizing calculations, inspections, maintenance, emergency response, and pump selection for both types, check out the U.S. EPA’s Wastewater Utility Operation and Management for Small Communities – Lift Station Overview webcast recording.

Learning the theory behind lift station operations, maintenance, and emergency response is an essential component to any wastewater operator’s training, however hands-on experience is also important. While we can’t give you hands on experience in a blog post, the following video offers a real world example of lift station maintenance. In this video, a Minnesota operator demonstrates how to remove debris from a clogged pump at his facility’s lift station. He also overviews the various components on the lift station control panel. Please note that when troubleshooting lift stations you should first be trained in operator safety. Safety topics to review before working with lift stations include lock out tag out, confined space, electrical safety, fall protection, crane safety, and tail gate safety.

Increasing Attention to Significant Noncompliance Dischargers

Author Jill Wallitschek and WaterOperator.org would like to thank EPA’s Office of Enforcement and Compliance Assurance for helping develop this blog post as part of its outreach to permittees about the Clean Water Act National Compliance Initiative.

National Pollutant Discharge Elimination System (NPDES) permit compliance protects public health and the environment from the release of harmful contaminants. During FY 2018 approximately 20% of the nation's 46,000 permit holders were in significant non-compliance (SNC) violations. SNCs are designated as serious violations warranting enforcement response if not promptly resolved. These violations ranged from significant exceedances in effluent limits to reporting failures. To better defend environmental and public health, the U.S. Environmental Protection Agency (EPA) has initiated a National Compliance Initiative (NCI) for NPDES permits and, in September, released a Compliance Advisory.

The NCI uses a full range of compliance assurance tools to reduce NPDES permittees non-compliance. By FY 2022 the NCI aims to reduce SNC rates by half. Small systems, this includes you too! This NCI will target facilities of all sizes equally. More attention will be directed toward facilities approaching or already in SNC. Facilities failing to comply can be subject to increased monitoring, inspections, enforcement actions, and other compliance activities. The NCI notes that permittees that voluntarily disclose and correct violations may be eligible for a reduction or elimination of penalties.

While this initiative might feel intimidating, the NCI offers resources to those taking immediate compliance efforts. The EPA recommends permittees first assess compliance by reviewing discharge monitoring reports (DMRs) and the Enforcement & Compliance History Online (ECHO) tool. If your facility does require assistance, reach out to your NPDES permitting authority for assistance. Other organizations like Rural Community Assistance Partnership (RCAP) and National Rural Water Association (NRWA) may also be able to provide assistance. Each state implements their own NPDES programs with the exception of New Mexico, Massachusetts, New Hampshire, and areas within Indian Country which are managed federally.

Small system SNCs can originate from a variety of causes. Failure to monitor, analyze, and report wastewater samples according to your NPDES permit can lead to a violation. Alternatively, incomplete or inaccurate compliance data transferred from state systems to the EPA’s Integrated Compliance Information System (ICIS) system can result in inaccurate identification of SNC permittees. Checking your compliance status in ECHO can prevent these complications. In addition to monitoring and reporting violations, unplanned discharges such as from a sanitary sewer overflow can also result in SNC. When wastewater effluent exceeds NPDES pollutant levels, utilities will also fall out of compliance. These exceedances typically arise as a result of operational, design, or administrative issues. We recommend the following resources to help improve your NPDES compliance:

Activated Sludge Process Control and Troubleshooting Methodology
Resolve 95% of your activated sludge process control issues using this Ohio EPA manual.

EPA’s ECHO Electronic Tool
The ECHO Detailed Facility Report tool helps facilities monitor compliance and verify the cause of SNC. Learn how to use the tool through the “Intro to ECHO Webinar” and other materials on this webpage.

EPA Webinars: Technical Assistance for Publicly Owned Treatment Works (POTWs)
The EPA hosts free webinars once a month offering technical assistance to POTWs. Find these webinars on our national training calendar or at the link above.

Managing Small Domestic Wastewater Systems
This TCEQ guide helps utilities develop plans to maintain or achieve compliance. The guide includes compliance checklists and planning worksheets. For additional assistance, TCEQ has developed and referenced resources for troubleshooting anything from bacteria control to process control.

Why Is My Lagoon Not Meeting Effluent Limits?
This article from the November 2016 issue of The Kansas Lifeline summarizes how to troubleshoot lagoon effluent compliance issues.

To find solutions to more specific compliance challenges, check out the WaterOperator.org resource library and small systems blog posts.

Featured Video: Why Are 96,000,000 Black Balls on This Reservoir?

By Jill Wallitschek

In 2015 the Los Angeles Department of Water and Power went viral when it unleashed 96 million shade balls into the Los Angeles Reservoir. The 175 acre reservoir served to store 3.3 billion gallons of treated drinking water. Shade balls were previously introduced to three other reservoirs in the LA area between 2008 and 2012. Releasing the 96 million balls marked the end of a 8 year project.

The project was first instigated when the Department of Water and Power was notified of high bromate levels in their water. Bromate (BrO₃^- ) is a disinfection byproduct regulated at 0.01 mg/L. High levels can increase risk of cancer. The chemical forms when bromide (Br ^- ), an otherwise harmless ion, reacts with ozone (O₃). For this reason treatment plants that use ozone are required to monitor for bromate monthly. Qualifying plants can reduce their monitoring to quarterly.

The LA Department of Water and Power determined that while they were finding low levels at the treatment facility, levels were elevated at the reservoirs. Upon investigation the facility realized that bromate can form under chlorination as well. When chlorinated water containing bromide reacts with sunlight, it forms bromate at even higher concentrations than ozonation. This realization prompted the facility to look toward a solution.

Removing the naturally occurring bromide wasn’t an option. Chlorination residual was necessary to protect public health. Ultimately the Department determined that sunlight was the only variable left to control.

After brainstorming for affordable and effective covers that could block sunlight across 175 acres, the Department discovered a product called “bird balls”. At the time, bird balls were used to deter waterfowl from swimming in contaminated water bodies or ponds near airport runways. These balls were made from high density polyethylene, a floatable, food grade plastic. The addition of carbon black gives them a black color and increases their life expectancy to approximately 10 years without sun bleaching. After consulting the manufacture, the balls were put through a small-scale test to access their bromate reduction abilites. The shade balls passed with flying colors.

Shade balls not only reduce bromate formation in the reservoir, but they deter birds, control algae, and reduce evaporation by 80 to 90%. Having been implemented under historical drought conditions, the innovation was applauded for its water saving results. According to the Massachusetts Institute of Technology these shade balls will have to be used for roughly 2.5 years to compensate for the water required to produce them. Since less chlorine is required to control algae formation with the adoption of shade balls, the treatment facility is experiencing significant cost savings as well. Over the course of their life span the reduction in chlorine use and evaporation will have paid for roughly half the shade balls.

Shortly after their installation, one of the reservoirs was removed from service and two of the remaining reservoirs transitioned to floating covers. Federal law requires that all drinking water bodies open to the air be covered. Transitioning the final Los Angeles Reservoir would have been too cost prohibitive based on its size. So given the effectiveness of the shade balls in such a large area, they shall remain in the Los Angeles Reservoir to prevent bromate formation, evaporation, and algae for the Los Angeles people.