Depends a lot on mode of transmission.
If it is airborne, our sanitation and health care system won’t be of much help.
If it is passed by sweat, it could tear through an urban area in the summer, especially areas that depend on public transportation and plastic seating.
If it is fecal/oral then yes our sanitation system will provide a lot of protection.
As far as health care, it could swing either way, currently, we have no way of treating a mass outbreak, and a trip to the ER could be the primary source of exposure.
Ebola is spread through contact with infected bodily fluids. It can spread through droplets, but is not airborne. Fomites may be a means of transmission, but there is no good data on that.
I could envision a situation where someone would have diarrhea, and flushing the toilet would propel droplets of Ebola contaminated liquid around the restroom, which might be highly infectious for a short period of time afterwards. I do not know if this is a plausible situation, however.