Short answer: municipal water is treated, disinfected and monitored by a regulated utility that publishes an annual report; your household concerns are usually hardness, disinfectant taste and odor, and plumbing-related metals. Well water is your responsibility from the ground up: New York State recommends testing for bacteria every year and for other contaminants every three to five years through a certified laboratory, and treatment should follow those results, not precede them.
Who is responsible, and what information exists
| Municipal water | Private well | |
|---|---|---|
| Who monitors it | The public water system, under NYS Department of Health and EPA rules | You |
| Disinfection | Chlorine or chloramine residual maintained in the pipes | None unless you install it |
| Published information | Annual water quality report naming the source, disinfectant, and detected contaminants | Nothing unless you test; a well log may describe depth and geology |
| Typical household concerns | Hardness, chlorine/chloramine, lead or copper from household plumbing | Bacteria, nitrate, hardness, iron, manganese, sulfur odor, arsenic, radon, pH, sometimes PFAS or VOCs depending on surroundings |
| First step before treatment | Read the report; measure hardness and residual at the tap | Certified laboratory test, then in-home screening |
| Where to get help | Your water provider | Your county health department; NYS DOH private well program |
Testing a private well
New York State's guidance for well owners is specific:
- Coliform bacteria: at least once a year, and after any work on the well, after flooding, or whenever the water's color, taste or odor changes. Bacteria are the most common risk from contaminated drinking water.
- Other contaminants: every three to five years. The state's fact sheet lists lead, nitrate/nitrite, turbidity, arsenic, iron, manganese, hardness, alkalinity, pH and sodium, and local health departments may have their own schedules.
- Use a laboratory certified under the Environmental Laboratory Approval Program (ELAP). The state specifically advises against relying on water treatment vendor tests or store-bought kits for health decisions.
- If a contaminant is found, contact your local health department; corrective action or treatment may be needed. If you suspect fuel or chemical contamination, the NYS DEC spill hotline is (800) 457-7362.
- Late spring or early summer is suggested as the best time to sample.
Where we fit
We agree with the state. Our in-home assessment is a treatment-oriented screening and does not replace a certified lab test on a well. We will help you choose a lab and a test panel, read the report with you, and recommend treatment that responds to it. We will not sell well-water treatment on the strength of our own screening alone.
Questions to ask about your well
- How deep is it, and is it drilled, driven or dug? (Shallow and dug wells are more vulnerable to surface contamination.)
- When was it last tested, and for what?
- Is there a treatment system already, and when was it last serviced?
- What is nearby: septic systems, farmland, road salt storage, a former gas station, an industrial site?
- Does the water change with the seasons or after heavy rain?
- Are there stains (orange-brown for iron, black for manganese, blue-green for copper), odors (rotten egg for sulfur), or sediment?
How treatment follows testing
Well water problems come in combinations, and the order of treatment matters. Sediment is removed before anything else. Iron and manganese are oxidized and filtered before water reaches a softener, or they foul the resin. Bacteria are handled by disinfection (ultraviolet or chlorination), not by softening or RO. Hardness is softened. Drinking-water contaminants such as arsenic, nitrate or PFAS are addressed at the kitchen sink with reverse osmosis once a lab confirms them. A system that addresses the wrong problem first is money wasted.
About the featured systems and wells
The Defender, Hydronex and Terminator iGen C systems featured on this site are designed for municipal water or for wells that are disinfected with chlorine or chloramine. For an undisinfected private well, Puronics directs dealers to base configurations without the Clearess media, and other equipment may be needed ahead of them. We recommend from your lab results, not from the product list.
Municipal water: what to actually check
If you are on a public system, the safety questions are largely answered by the utility and its annual report. The questions that remain are household ones: how hard is the water at your tap, which disinfectant is used and how strong is the residual, and is there lead or copper from your own plumbing (which the utility's report cannot tell you). Our in-home assessment answers the first two; a lab test of a first-draw sample answers the third.