The large company that I worked for in Dallas had operations in Australia, Canada, Texas, and the UK.
The U.S. has one of the most complex tax code(s) of any of the OECD countries. It is a workfare program for tax accountants, tax lawyers, and tax software peddlers.
When I worked in Australia, my U.S. tax return, which was prepared by a big four accounting firm, ran 28 pages. My Australian tax return was two pages.
We had 135 people in our headquarters tax department. Many of them were CPAs and tax lawyers. Just staying abreast of the sales and use taxes in Texas required the full-time efforts of approximately 10 people.
Texas imposes a sales and use tax of 6.25% on retail sales, leases, and rentals of most goods. But this is only the beginning. Local taxing jurisdictions (cities, counties, special purpose districts, and transit authorities) can up the local sales and use tax by 2%. Just figuring out what is taxed, when, and at what rate is mind boggling.
Simple tax systems are more efficient and effective. But most attempts to simplify the tax code(s) in the U.S. have fallen on deaf ears and/or push backs from lobbyists that represent people with a vested interest in complexity.
Not a huge problem to fix. My guess is someone used the wrong solder to join the pipes together. Regardless they have two choices, replace the plumbing once they find the issue (most of it should be under the car and the restrooms are all at one end which should make it easier to fix) or install a water filtration system in each restroom prior to outletting the water to public.