What the city reports about your water
The City of Fountain Valley's 2026 Consumer Confidence Report covers 2025 data. It lists average hardness of 217 milligrams per liter, or 13 grains per gallon, with a range of 10 to 15 grains. The city's own FAQ describes water with 10 grains or more as hard. The report also notes that in 2025 the city supplied groundwater only.
Hardness varies by source and delivery area, so the number at your tap may differ. Test your tap, and ask the city for its latest annual report to see current figures.
Where Fountain Valley sits on the hardness scale
The gauge below shows the city's range and average on a 0 to 20 scale. Anything above 10 grains is hard by the city's definition.
Outlined band: city range of 10 to 15 grains per gallon. Dark marker: 13 grains per gallon average (city 2026 water quality report, 2025 data).
Signs of hard water at home
Scale shows up in the same places in most homes.
White crust on fixtures
Calcium and magnesium dry on faucets, showerheads and glass.
Spotted dishes
Mineral spots appear after the dishwasher dries.
Short-lived heaters
Scale insulates elements and tank floors, causing noise and failure.
Dry skin or stiff laundry
Minerals interfere with soap and leave residue.
Softener or filter?
They do different jobs. Many homes use one or both.
| System | What it addresses | Note |
|---|---|---|
| Salt-based softener | Hardness minerals | Needs salt and a drain, may be restricted in some areas |
| Salt-free conditioner | Scale formation | Does not remove minerals |
| Carbon filter | Taste, odor, chlorine | Does not soften |
| Reverse osmosis | Drinking water at one tap | Small system under the sink |
Tired of scale on everything?
Call to talk through softener and filter options.
Testing and choosing a system
A hardness test kit gives a quick figure, and a lab test covers other items. Decide what you want to solve first, whether it is scale, taste or a specific contaminant. Your water provider's annual report lists what is in the supply, and that helps you avoid paying for treatment you do not need.
The plumber sizes the system to household size and flow. A softener that is too small regenerates too often and wastes salt.
Local rules and discharge
Some California communities restrict salt-based softeners because of the salt they send to wastewater. Ask the City of Fountain Valley or the sanitation district what applies at your address before you buy. The plumber can explain what a drain connection requires.
If rules are strict, a salt-free conditioner or a filtration-only plan may be the right path.
What water treatment costs
System prices vary widely, and so does the install. You hear a clear price before the work.
What moves the final number
Ask about long-term costs, not just the install. Call (714) 750-8637.
Who sets the rules on softeners
According to the City of Fountain Valley's own FAQ, water at 10 grains or more is hard. The rules on where softener discharge may go are set locally, so the City of Fountain Valley or the sanitation district is the place to ask. Plumbing connections follow the California Plumbing Code, based on the Uniform Plumbing Code (UPC).
Effects on the water heater
Softened water helps tank heaters last longer and keeps tankless units cleaner. If you already have scale in the tank, a flush before the softener goes in helps. See our water heater repair page for symptoms of scale.
A softener does not replace maintenance, but it lowers how fast scale builds.
Common Questions
The city's 2026 report, covering 2025 data, lists average hardness of 217 milligrams per liter, or 13 grains per gallon, with a range of 10 to 15.
It depends on how much scale bothers you and what it costs you in fixtures and heaters. Test your tap first.
Softened water adds a small amount of sodium. People on restricted diets may want a separate tap for drinking water. Ask your doctor if unsure.
Rules vary by community. Ask the City of Fountain Valley or the sanitation district before you buy.
No. Most filters address taste and chlorine, not hardness. Only softening or conditioning addresses scale.
No. It is a planned service. For leaks or failed heaters, call (714) 750-8637 and we handle them as emergencies.