A city file on this site is a public water system. The utility prints a Consumer Confidence Report. Hardness, disinfectant, and a few regulated rows are whatever that report said. That report is not your neighbor’s well.
A private well is not a public water system. EPA’s private-well page tells well owners to use a certified laboratory, and to test more when color, odor, or staining changes. Annual bacteria and nitrate are the usual starting pair. Iron, sulfur, hardness, and pH are the usual well-equipment questions. None of those come from a Phoenix or Charlotte PDF.
What people mix up
“The city next door is 20 grains, so my well is too.” Geology is local. A well 400 feet down can be a different aquifer than the municipal plant. Copying a city grains number onto a well is how you buy the wrong tank.
“The salesman said city water is just like a well.” City water is disinfected. The CCR will say chlorine or chloramine if the utility printed it. A well usually is not chlorinated at the house unless you added it. Carbon for city chlorine is a different box from an iron filter.
“I am inside city limits, so I am on city water.” Not always. Some addresses keep a well. Read the bill. If there is no utility charge and there is a well cap, you are not on the CCR we filed for that city name.
Equipment, without a medical story
- Hard well water still wants a legality check before a brine drain. A rural sewer or septic is not LACSD, and it is not “anything goes.”
- Orange stain and rotten-egg smell are iron and sulfur, not a reason to start with a 32,000-grain softener.
- Low pH is calcite first. A softener after an acid well without neutralizing is the usual expensive mistake.
If you are shopping a kitchen tap for a listed dissolved contaminant, that is still under-sink RO with a directory listing — city or well. We will not turn a well test into a diagnosis.