Testing the Link Between Wildfires and Benzene Contamination

In the weeks following the Santa Rosa, CA wildfires last October, city officials found elevated levels of benzene in water system samples taken from the nearly totally-razed Fountaingrove neighborhood. The first round of samples returned 4 results of over 500 parts per billion, with one of these at 918 parts per billion (MCL for benzene in drinking water is 1 part per billion). A second round of testing produced similar numbers over the MCL, without the higher spikes. A total of 145 samples have now shown elevated levels.

According to this article in The Press Democrat, city officials, who for months have stressed that the contamination appeared isolated to the advisory area, were taken by surprise that six of those results were from outside the existing advisory area.

With the help of a forensic chemist, who helped eliminate the possibility of petroleum leaks, the city now suspects that the most likely cause of contamination is heat damage to high-density polyethylene service lines or other plastic components (such as PVC) in the water or wastewater system. The city is enacting more extensive testing to find out if plastic laterals are responsible. Once the exact cause is identified, the city will consider solutions. Replacing the water system could cost over $20 million.

Interested in finding out more about benzene contamination in drinking water supplies, including sampling methods, treatment strategies, and private well concerns? Check out this EPA website or this Oregon Health Authority factsheet. Another useful resource is this template (from North Carolina) to be used when high levels of Benzene need to be reported to the public.

Featured Video: Buried History - Wooden Water Mains

There's quite a lot of talk these days about aging underground infrastructure, but I bet nobody is referring to archaeological finds! Long-abandoned wooden pipes left beneath older communities aren’t unheard of, but outdated utility plans typically don’t pinpoint their location and it is rare to dig one up, according to this Washington Post article. This week's featured video shows how the New York City Department of Design and Construction worked with Chrysalis Archaeology to preserve their 200-year old wooden water main "find", a portion of the first piped water system in the city. 

Wooden water mains have been found in rural areas and large and small towns across the country, from Baltimore to Philadelphia to Gladstone, Michigan and all the way to the West Coast as well. Some of these wooden pipes serviced customers for 100 years or more! Interested in finding out more? Check out this article about the era of wooden water pipes in Portland, Oregon. 

Drinking Water and Lead Service Lines: Partnering to Protect Human Health

Last month, the Lead Service Line Replacement Collaborative, a group that includes the AWWA, NRWA, ASDWA, NAWC, RCAP and WRF among others, hosted a panel discussion entitled "Drinking Water and Lead Service Lines:  Partnering to Protect Human Health." The focus of this discussion was how partnerships between water utilities and public health agencies are key to helping lead service pipe replacement programs really get off the ground. 

Dr. Lynn Goldman from the Milken Institute School of Public Health started off the discussion by providing historical context, pointing to precedents that allowed lead to be "managed in place" while also allowing higher lead levels in water to be acceptable practice. She explained that when EPA's first Lead and Copper standard (1992) began to improve health outcomes for water consumers, lower-level effects began to be unmasked. This phenomenon, according to Goldman, underscores the importance of enacting revisions to the Lead & Copper Rule, as well as best practices for lead sampling strategies. Goldman emphasized the importance of developing carefully crafted lead pipe removal programs so that more lead isn't released into drinking water supplies during the remediation process.

Other takeaways from the panel of speakers include the following:

• Some communities bear disproportional consequence of lead contamination.
• Lead poisoning can go undetected in individuals, but even low levels of lead affect the brain.
• Action alerts vary state-by-state, but Amanda Reddy from the National Center for Healthy Housing recommends an action level of 5 ug/dL.
• Lead-based paint is the most widespread cause of lead poisoning, but we need comprehensive solutions to address ALL hazards. 
• There are proven & cost effective solutions. In fact, replacing lead service lines for just the children born in 2018 would protect 350,000 individuals from future lead poisoning.
• Solutions must include diverse stakeholders including drinking water professionals, public health officials, elected officials, community leaders and concerned consumers.
• Lead contamination resources need to be easily accessible for individuals affected by lead in their drinking supply. 
• Simply providing bottled water is not a long-term solution.

Public Health representatives from two municipalities (Milwaukee and Cincinnati) also spoke at the forum, and offered their lessons learned:

• Partial Lead Service Line replacement can cause more lead to be released into drinking water supplies. Full line replacement should be the desired strategy, and working with all stakeholders to pass city-wide ordinances requiring full replacement is the most effective way to do this. 
• Developing lead protocols for emergency leaks and repairs is critical.
• City-wide outreach and education/awareness campaigns are a must.
• Prioritizing schools or childcare facilities for line replacement makes sense. 
• Milwaukee used Wisconsin's Drinking Water State Revolving Funds to replace service lines at schools, Cincinnati used a HUD grant to replace service lines for low-income residents.  
• Cincinnati formed a county-level collaborative and pooled resources, technical providers, outreach professionals. They also targeted their outreach to PTAs, Church groups, community organizations. 
• Challenges include: switching out interior plumbing (inside private residences), missing out on targeting some childcare/schools because they are not licensed, and finding the time and resources to communicate effectively with customers. 

Finally, Cathy Bailey, from Greater Cincinnati Water Works, a system that encompasses an area with the second highest child poverty rate and second-highest number of lead lines in the country, offered her perspective. Her system has adopted a 15-year program for full service line replacement, with cost-assistance for low-income residents and cost-sharing arrangements for other property owners. Her advice for water systems? 

• Water Utilities should lead the effort to start the conversation about lead in drinking water and service line replacement. Utilities have a  big stake in this issue. 
• Utilities can be proactive in providing tools and education to their community. Cincinnati provides online resources such as a lead "map' and free lead testing as well as assistance to schools funded by their general operating budget.
• Utilities can be proactive in communicating within their organization. Cincinnati Water Works has an internal dashboard to compile lead test results, health statistics and more. They then can identify homes that qualify for free P.O.U filters. 
• Cincinnati Water Works partners with the health department to share data, understand water quality issues and help individuals and schools mediate problems. 

The panel participant's message was clear: lead service line replacement is simply the right thing to do for communities, and partnerships with health departments and water utilities are critical to that process. Want to find out more? Check out the Lead Service Line Collaborative's online roadmap/toolkit or follow #safewater on Twitter. 

Repairing a Live Water Main

Get out your waders, ladders, clamps and sleeves! There’s nothing quite like the excitement of repairing a water main under pressure – and nothing quite like the kind of water operator who willingly climbs into a deep hole filled with water and mud in all types of weather.

According to Colorado Springs Utilities, there is no shortage of these opportunities: more than 240,000 water main breaks occur each year in the United States, and each one has its unique challenges. But for many of these breaks, you don't need to turn off the water.

Why? Well it goes without saying that repair work should be performed, if at all possible, without interrupting service to customers. Moreover, maintaining positive pressure in the line helps the utility avoid water quality concerns, further service failures caused by valve closures and the need for additional monitoring/sampling. 

Finally, doing live repairs means the utility does not have to issue a boil order notice, which can affect customer confidence and add additional incident reporting/paperwork requirements.  

So, when done safely and correctly, live water main repairs not only make sense for everyone, but also provide a bit of excitement in the work week! 

Need a step-by-step breakdown on the process? Check out this video from the Village of Downers Grove, IL: How to Repair A Water Main Break in 8 Easy Steps

And, for your viewing pleasure, here are a selection of YouTube videos of recent live water main repairs: 

• This video provides guidance for strategic foot placement during a live water main repair.
•  And this video offer proof of how quickly the repair can be made!
• And this video shows an example of a water main break you will hope to never see in person!