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Chicago has the most lead pipes in the nation. We mapped them all

9 Brajeshwar 4 8/31/2025, 1:27:06 AM grist.org ↗

Comments (4)

SilverElfin · 2d ago

I wonder what the accuracy of the data is like. And what do you do about damaged pipes? I read that cities lose a lot of water to leaks. Doesn’t that also mean pollutants can get in? And it won’t matter if your pipe is lead or whatever else.

An aside: lead exposure is thought to lead to increase violence. I wonder if Chicago having the most lead pipes is also a contributing cause of their (reputed) crime problem.

toomuchtodo · 1d ago

You replace them by running new service lines using directional boring, falling back to trenching when directional boring is not an option. In the case of waste and sewer lines, you can run an epoxy coating internally (“relining”) versus replacement, which has cost savings ($100-$250/foot of pipe).

Broadly speaking, maintaining this infrastructure is expensive because the need for labor is unavoidable and it is labor intensive.

brianwawok · 1d ago

Directional what? When Chicago replaces pipes, they dig the street up, put in pipes, and lay down a new street. I’ve literally seen them do this, then one month later tear up the same street for a natural gas pipe project .

These Chicago pipes are end of life and need replaced. They have been working on it for at least 20 years.

*in theory they claim to be working hard to better coordinate this between agencies.

toomuchtodo · 1d ago

https://youtu.be/jFTzwGv1sUg

https://youtu.be/t3hTQDfZrfk

https://youtu.be/BKGizzPJIqE

https://www.leadsafechicago.org/lead-service-line-replacemen...

> Replacing a lead service line with a new copper service means running the new line from the water main in the street all the way into the house. There are two ways that can be done. With open trench replacements, a trench is dug from the home through the parkway to install the new service and access the water main. Trenchless construction runs the new service to the main underground, causing less disturbance to the surrounding area. The type of procedure performed will depend on several factors specific to each replacement.

https://www.chicago.gov/content/dam/city/depts/water/general...