Naples Water Quality: What Your Tap Water Means for Your Plumbing

Quick answer

Naples-area public water is treated and safe to drink, but it isn’t the same everywhere. The City of Naples lime softens aquifer water, while the county district blends membrane and lime-softened water. Both still carry some hardness and a disinfectant. Wells in Golden Gate Estates are untreated and need testing before you pick equipment.

Who supplies your water

A Naples mailing address doesn’t tell you much. The City of Naples runs its own water utility, and its service area reaches past city limits into a chunk of unincorporated land, roughly south of Pine Ridge Road and west of Livingston Road, plus an area east along US 41 toward Thomasson Drive. Most of the rest of urban Collier, including North Naples, East Naples and Golden Gate City, is on the Collier County Water-Sewer District.

Then there are the exceptions. Marco Island has its own utility. Ave Maria has a private utility company. Immokalee has an independent water and sewer district. Most of Golden Gate Estates has no public water at all. The Orangetree area was served for years by a private company before the county took that system over, and Golden Gate City’s system was run by a governmental utility authority before it came back to the county district.

The fastest way to know is your water bill. It names the provider, and that provider’s annual water quality report is the document that describes your water.

We cover Marco’s water in more detail on our Marco Island plumber page, so the rest of this guide sticks to the city, the county district and private wells.

Where City of Naples water comes from

The city pumps groundwater from the Lower Tamiami Aquifer through two wellfields, about 54 wells in all, and treats it at a lime softening plant rated at 30 million gallons a day. The service area covers roughly 62,000 people, which is about three times the population inside city limits.

Lime softening is an older, proven process. Lime is added to the raw water, which raises the pH and makes much of the dissolved calcium and some magnesium drop out as solids. Those solids settle, the water is filtered, the pH is adjusted back down, and a disinfectant is added before the water leaves the plant.

What that means in your house: lime softening takes out a good share of the hardness, but not all of it. The water that reaches your tap is still carrying calcium, and it’s chemically stable on purpose so it doesn’t eat the city’s pipes. That’s the same reason it can leave a light white film on glass shower doors and slowly build scale inside anything that heats water.

The city also runs a separate reclaimed water system for irrigation in parts of its service area. If your property has a reclaimed connection, that pipe is not drinking water, it’s usually purple, and it should never be tied into the house plumbing. Utilities typically require a backflow assembly on the potable side when reclaimed water is on the property. Our backflow testing page explains how those devices work.

Collier County Water-Sewer District water

The county district serves about 83,400 water customers from two regional plants, and the two plants started out with different technology.

• North County Regional Water Treatment Plant: opened in 1993 as a nanofiltration plant and later added reverse osmosis. Both are membrane processes that push water through very fine membranes and strip out most dissolved minerals.
• South County Regional Water Treatment Plant: opened in 1984 as a lime softening plant and added reverse osmosis in stages between 2004 and 2009.

Membrane-treated water starts out very low in minerals. Utilities blend it and adjust it before it goes into the mains so it isn’t aggressive toward pipe. The result is that county water in one neighborhood can behave a little differently from county water in another, depending on which plant feeds it and how the blend is running.

For a homeowner the practical point is simple. Don’t assume your neighbor across the county line, or across town, has the same water you do. The county’s annual report lists results by system, and that’s the one to read if your bill says Collier County.

Hardness: reading the numbers

Hardness is mostly dissolved calcium and magnesium. Utility reports usually list it in milligrams per liter (mg/L), sometimes as calcium carbonate. Softener sellers and water heater manuals use grains per gallon (gpg). One grain per gallon equals about 17.1 mg/L, so divide the mg/L number by 17.1 to convert.

Treated public water in the Naples area generally lands in the moderately hard range on recent reports, well below what comes out of a typical untreated limestone well. That’s a real difference. Moderately hard water won’t wreck a tank heater in a few years, but it will coat a tankless heat exchanger, a showerhead and a faucet aerator over time.

Hardness is reported as a range and an average because it changes with the season, the blend and which wells are running. If you’re sizing a softener, use the high end of the range, not the average.

Chlorine, chloramine and your fixtures

Every public system has to keep a disinfectant residual in the pipes all the way to the farthest tap. Utilities use either free chlorine or chloramine, which is chlorine combined with a small amount of ammonia. Some switch to free chlorine for a few weeks a year to clean the system, and you may notice a stronger pool smell during that time. Your utility’s report and website will say which it uses.

The difference matters more than people expect:

• Chloramine lasts longer in the pipes and produces fewer disinfection byproducts, which is why many utilities use it.
• It doesn’t boil off or gas out if you let a pitcher sit overnight. Plain chlorine mostly will.
• Ordinary carbon filters take out chlorine easily but need much more contact time for chloramine. Filters sold for chloramine usually use catalytic carbon.
• Chloramine is harder on some rubber. Toilet flappers, fill valve seals, faucet washers and older supply hoses can swell, soften or crack sooner. Parts labeled chloramine resistant are worth the small difference.
• Fish tanks and home dialysis need the chloramine removed. Aquarium dechlorinators are made for it.

If you keep replacing a toilet flapper every year or two, the disinfectant is one of the first things we’d suspect. Our toilet repair page covers the other usual causes.

What Naples water does to fixtures

On city or county water, most fixture complaints we see trace back to slow mineral buildup, not to anything dangerous in the water. Here’s how it usually shows up.

• Faucet aerators that clog with white grit, so the stream gets weak or sprays sideways.
• Single-handle faucet cartridges and shower valve cartridges that get stiff, drip or stop mixing hot and cold properly.
• Showerheads losing spray nozzles one at a time.
• Dishwasher and ice maker inlet valves that stick or fill slowly.
• White spots on glass and dark fixtures that won’t wipe off with plain water.
• Toilet tanks that run because a seal got hard or scale built up on the fill valve.

Vinegar soaks handle aerators and showerheads. A cartridge that’s already stiff is usually cheaper in time and trouble to replace than to clean. If several fixtures in the house act up at once, though, the cause may be pressure, not scale, and that calls for a gauge on a hose bib before anyone starts swapping parts.

Water heaters and tankless units

Anything that heats water speeds up scaling, because calcium carbonate gets less soluble as the temperature rises. That’s why the water heater is where Naples water leaves the most evidence.

Tank heaters

Scale flakes off the elements and the tank walls and piles up on the bottom. You’ll hear it as popping or rumbling on gas units, or see an electric lower element burn out early. Flushing a few gallons from the drain valve once a year slows it down. The anode rod is the other wear part. It corrodes on purpose so the tank doesn’t, and once it’s gone the steel tank starts to go. Our water heater page covers repair versus replacement.

Tankless heaters

A tankless unit runs water through a small heat exchanger, so moderate hardness that a tank shrugs off can clog it. Most manufacturers call for descaling on a set schedule and tie warranty coverage to water quality. Isolation valves on the unit make that a routine job. We go deeper on this in tankless vs tank in hard water.

If you add a softener, tell whoever services the heater. Softened water reduces scale, but it can also wear the anode faster in some tanks.

Pipes: copper, CPVC and PEX

Naples housing covers a wide spread of eras, and the pipe inside the walls tends to match. Older homes in the city core may still have copper or galvanized supply lines. Homes from the late 1970s into the mid 1990s may have polybutylene. Later homes mostly have CPVC or copper, and newer construction is mostly PEX.

Water chemistry plays into how those materials age:

• Copper depends on a thin protective layer forming on the inside wall. Water that’s low in minerals or off on pH can keep that layer from forming well, which is one of several factors linked to pinhole leaks. High velocity, poor soldering and stray electrical current are others.
• Galvanized steel rusts from the inside out no matter what the water is like. Brown water at first draw and low pressure at one or two fixtures are the classic signs.
• Polybutylene is known to break down from disinfectants in the water over time, which is why insurers flag it on a 4-point inspection.
• CPVC and PEX don’t corrode the way metal does, but their fittings and connections still wear. PEX should be rated for chlorinated water, and the major brands are.

If you’re seeing repeated pinholes in copper, we’d rather look at the whole system than patch one leak at a time. Our PEX vs copper repipe guide lays out the tradeoffs.

Private wells in Golden Gate Estates and outlying areas

Most of Golden Gate Estates, and a lot of rural east Collier, runs on private wells and septic. A well owner is their own utility. Nobody tests that water unless you do, and federal drinking water rules for public systems don’t apply to a private household well.

Estates well water commonly carries iron, sulfur and hardness. Iron leaves orange and brown stains in toilets, tubs and on walls the sprinklers hit. Hydrogen sulfide gives the rotten egg smell, and when it’s mainly on the hot side, it’s often the water reacting with the water heater’s anode rod. Every well is different, even on the same road, so we don’t recommend equipment without a test. In Collier County, well construction permits are issued by the county under a delegation from the South Florida Water Management District, so records for your well may be on file there.

A simple well checklist:

• Test for bacteria at least once a year, and again after any flooding over the wellhead, a repair to the pump, or a change in taste, color or smell.
• Get a broader test before buying treatment equipment: iron, manganese, hardness, pH, hydrogen sulfide and total dissolved solids at minimum.
• Keep the well cap sealed and the area around the wellhead graded so water drains away from it.
• Keep fertilizer, pool chemicals and fuel away from the wellhead, and know where the septic drainfield sits relative to it.
• Listen to the pump. If it clicks on every time someone washes their hands, the pressure tank is likely waterlogged.

Our well pump and pressure tank page covers the mechanical side, and the Golden Gate plumber page covers the Estates in more depth.

Filtration and softener options, explained plainly

Most Naples homes on public water don’t need heavy treatment. Wells usually do. The right setup depends on what the test shows and what’s actually bothering you, whether that’s taste, scale or stains.

Order matters on wells. Sediment first, then iron and sulfur treatment, then the softener, then reverse osmosis at the sink if you want it. Iron that reaches a softener first can foul the resin. On septic, ask about how and where the softener’s brine discharges before you buy one. Our water softener and filtration page covers installation and sizing.

How to read your annual water quality report

Federal rules require every community water system to give customers a Consumer Confidence Report each year, due by July 1 and covering the previous calendar year. The City of Naples and the county district both publish theirs online. It’s a dense document, but you only need a few parts of it.

• Step 1: Confirm it’s your system. Look at the name and system ID on the cover and make sure it matches the provider on your bill.
• Step 2: Read the source water section. It tells you which aquifer, which wells and which treatment plants feed you.
• Step 3: Learn the column headers. MCL is the legal maximum. MCLG is the health goal, which can be lower. MRDL applies to disinfectants. AL is the action level used for lead and copper.
• Step 4: Check the violation column. A Yes there means the utility exceeded a limit or missed a requirement, and the report has to explain it.
• Step 5: Find lead and copper. They’re reported as a 90th percentile from home taps, plus how many sites went over the action level. These numbers reflect household plumbing as much as the utility’s water.
• Step 6: Find the disinfectant. The report lists chlorine or chloramine levels, which tells you what kind of filter media you’d need.
• Step 7: Look for hardness and pH. They’re often in a separate table of unregulated or secondary results, if they’re included at all. If not, call the utility and ask.

Keep in mind the report covers water leaving the plant and sampled in the system. Old galvanized pipe, a failing water heater or a dead-end line in your own house can change what comes out of your faucet.

When to call a plumber about your water

Some water complaints are utility issues and some are house issues. If the whole neighborhood has cloudy or brown water after main work, call the utility first. If it’s only your house, or only one faucet, it’s on your side of the meter.

• Brown or rusty water from one fixture, or only on the hot side.
• Rotten egg smell only from hot water.
• Repeated pinhole leaks in copper lines.
• A tankless heater throwing scale or flow error codes.
• Pressure dropping at several fixtures at once.
• A softener or filter that’s been bypassed, leaking or not regenerating.
• Blue-green stains at copper fittings or under sinks.

Our annual maintenance plan is a yearly check-up of the plumbing system, which is a good time to catch scale and heater wear early. Call (239) 518-4198 for details, or send a request through our contact page. Office hours are Monday through Friday, 8am to 5pm.