Hardness
Moderately hard average72mg/L as CaCO₃
Groundwater average; range 20–180
USGS hardness classes
About 4.2 grains per gallon. Test the water entering your home before sizing a softener.
2022–2025View source
- 1Your water
- 2Your home
- 3Your system
Tulare County Water Quality Report
Showing utility report
Cal Water — Visalia System
2025 utility report; each result retains its measurement period
Results for Cal Water — Visalia System in Tulare County. Confirm the supplier and system on your bill.
Your water at a glance
See the amount, the comparison and what it means. “Below” refers to the stated benchmark, not zero risk.
Chlorine
Reported level below MRDL1.0mg/L
Distribution average; range ND–2.7
MRDL: 4 mg/L
Match the filter to the disinfectant used by this utility.
2025View source
TTHMs
Reported level below benchmarkNDµg/L (ppb)
Highest annual average; sampled range ND
Report MCL: 80 µg/L
A system result does not measure the water at an individual home.
2025View source
HAA5
Reported level below benchmarkNDµg/L (ppb)
Highest annual average; sampled range ND
Report MCL: 60 µg/L
A system result does not measure the water at an individual home.
2025View source
Fluoride
Below report benchmarkNDmg/L
Groundwater average; range ND–0.15
California MCL: 2 mg/L
Standard filtration and softening do not establish fluoride reduction.
2022–2025View source
Lead
90th percentile below action levelNDµg/L (ppb)
90th percentile; 50 sampled sites
Report action level: 15 µg/L
No sampled sites exceeded the report’s action level. Nondetect does not mean zero.
2025View source
Your provider needs its own report.
Continue with your home details for general filtration guidance. We will not use another utility’s numbers as your result.
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A city report cannot establish a well’s water quality. Well-water treatment depends on your test results and site conditions.
Explore well-water systems →Water hardness by provider
The figures below are provider-specific. They are not a countywide average.
| Utility | Hardness | Hardness source |
|---|---|---|
| 72 mg/L · Moderately hard average | 2022–2025 |
View Full Water ReportOpen the measured results, dates, comparisons and original utility report.
The numbers behind your report
Selected results with the original sampling dates and measurement basis. Open the utility report for every parameter, notice and footnote.
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| What was measured | Reported amount | Sample year / source date | How to read it |
|---|---|---|---|
| Hardness | 72 mg/L as CaCO₃Groundwater average; range 20–180 | 2022–2025View source ↗ | Moderately hard averageAbout 4.2 grains per gallon. Test the water entering your home before sizing a softener. |
| Chlorine | 1.0 mg/LDistribution average; range ND–2.7 | 2025View source ↗ | Reported level below MRDLMatch the filter to the disinfectant used by this utility. |
| TTHMs | ND µg/L (ppb)Highest annual average; sampled range ND | 2025View source ↗ | Reported level below benchmarkA system result does not measure the water at an individual home. |
| HAA5 | ND µg/L (ppb)Highest annual average; sampled range ND | 2025View source ↗ | Reported level below benchmarkA system result does not measure the water at an individual home. |
| Fluoride | ND mg/LGroundwater average; range ND–0.15 | 2022–2025View source ↗ | Below report benchmarkStandard filtration and softening do not establish fluoride reduction. |
| Lead | ND µg/L (ppb)90th percentile; 50 sampled sites | 2025View source ↗ | 90th percentile below action levelNo sampled sites exceeded the report’s action level. Nondetect does not mean zero. |
| Nitrate as nitrogen | 2.5 mg/LGroundwater average; range 0.43–7.8 | 2023–2025View source ↗ | Reported average below benchmarkNitrate requires treatment selected for that specific contaminant. |
| PFOS | ND–4.8 ng/L (ppt)Groundwater range; average ND | 2019–2025View source ↗ | Detections in some samplesRead the utility’s explanation of sampling, treatment, and compliance. A source maximum is not your tap result. |
In drinking water, ppm ≈ mg/L, ppb ≈ µg/L and ppt ≈ ng/L. Calculated hardness in grains per US gallon (gpg) = mg/L as CaCO₃ ÷ 17.118, rounded to one decimal. ND means below the reporting limit, not zero.
MCL is an enforceable contaminant limit; MRDL is a disinfectant limit. A PHG is a health goal, not the legal limit. Lead/copper action levels use system sampling percentiles, not a safe-tap threshold. TTHM/HAA5 comparisons use locational running annual averages.
PFAS results are compound-specific. Source monitoring, entry-point samples and tap tests are different. Notification and response levels in a utility report are not maximum contaminant levels; do not infer a compliance violation from a single value. EPA PFAS benchmarks and implementation ↗
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Source water. Groundwater sources serving Cal Water’s Visalia System.
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What this means for your home
Visalia’s reported hardness averages 72 mg/L, with a source range of 20–180 mg/L.
This report covers Cal Water’s Visalia System. Other Tulare County cities, small community systems, and private wells have separate conditions. In particular, a nitrate or PFAS concern needs results and treatment evidence for the actual source.
A useful local question
Can I use the Visalia report for a private well in Tulare County?
No. Private wells need their own testing. A nearby public system’s monitoring cannot establish your well’s hardness, nitrate, bacteria, or other water characteristics.
Sources and methodology
We keep each utility’s results separate, show the reported sample year, and distinguish averages, maxima and tap-sampling percentiles. Hardness classifications use USGS ranges. Missing data stays unknown.
Different name on your water bill?
These local providers publish separate reports. Follow the matching utility link; the measurements above do not describe these systems.
- Cal Water — Visalia System ↗2025 utility report; each result retains its measurement period
- USGS hardness classification
- EPA PFAS benchmarks and implementation
Sources checked November 15, 2026
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