The Michigan lead pipes or whatever might be a better story to point to if you want to show a failure like the one you suggest.
Water grids malfunction. Some water management departments suck. Some are good. Some cities have better infrastructure than others.
Inevitably though, these are taken as "see! I'm right." Tories are evil. Democrats are useless. Communism doesn't work. Capitalism hates humans. Bureaucrats suck. Privatisation is a failure. Regulators are ne'erdowells. Etc. Etc.
One of the first principles of formal logic deals with this sort of thing. Reductio and absurdum. When a statement or logical method can yield every conclusion and it's opposite, it's the logic or assumptions that are false.
OTOH, I'm somewhat stumped. Some forms tend to be condescending or dismissive. Assigning motives, for example. Meta, like my response to your comment. Yet, motivated reasoning exists. Cognitive fallacies recur. Etc.
I don't want to be condescending or bad faith. But in these cases, I don't see much daylight between condescending and just not commenting. There is such a thing as adopting a worldview, and then suddenly seeing everything through that lens. As you say, you already hold the position that "the American project is failing its residents." When the water grid has a fault, it's proof of this. My contention is that if you had previously adopted an alternative worldview, you'd hold the recurring culprit (capitalism, bureaucracy, republicans, environmentalism, etc.) responsible by the same logic.
https://www.nsw.gov.au/environment-land-and-water/water-rest...
Not starting.
"The NSW Government has announced that Water Wise Guidelines have replaced Level 1 water restrictions [...] The restrictions have eased, but let’s stay water wise."
So treating each cumec takes longer - filters clog faster, UV needs to be applied for longer...
Hence the water restrictions - throughput has to decrease to maintain quality.
Boil water notices occur when your water treatment has entirely failed.
I don't know how it is where you live, but here, boil water notices generally happen because of mundane things well downstream of water treatment. Water demand too high, dropping pressure? Boil water notice. Water main breaks? Boil water notice. In this case, although I wouldn't describe it as mundane, the boil water notice occurred because of a temporary power loss resulting in a pressure drop, not because the water was actually known to be contaminated.
It's also hard to compare across water treatment standards. Are the allowed contaminants the same? For example here, no amount of PFAS contamination results in an advisory, even though it's well over the limits.
I think a better point would be a) there's no such thing as the "American" water system; water systems are virtually all designed, implemented, run, and administered by municipal and county governments, with anyone remotely rural on a well; and b) any minor water failures in the US are going to garner extra attention for the next couple years because of the Jackson debacle.
OTOH, I have well water for myself. ;)
EDIT: Also here's a boil water notice in New South Wales from flooding events, 22 days ago.
https://www.msn.com/en-au/news/australia/residents-boil-drin...
During last July's heatwave, Texas's industrial bitcoin mining base "allow[ed] for over 1% of total grid capacity to be pushed back onto the grid for retail and commercial use.” [1] No other industrial-scale use of electricity can be turned off and back on when the grid needs excess capacity without harming that industrial production---you can't shut off a steel mill without enormous damage to production, or turn off a hospital without loss of life; but energy grid operators can sign contacts with bitcoin miners to have the right to dial them down to meet peak grid demand.
And yet, the NY Post article I sighted here spins the story anti-miners, missing the point: had the miner not been consuming power, the grid would have had 1% less to meet the peak heatwave demand. “There are over 1,000 megawatts worth of Bitcoin mining load that responded to ERCOTs conservation request by turning off their machines to conserve energy for the grid.”
Imagine if there were ten times as many miners there---they would have been able to provide 10% additional power to the grid during peak demand.
[1] https://nypost.com/2022/07/13/texas-bitcoin-miners-halt-oper...).
There are dozens of them.