Hardness
Soft / moderately hard averages26 / 95mg/L as CaCO₃
Folsom Lake / groundwater source averages
USGS hardness classes
Groundwater range 31–280. Test the incoming blend instead of averaging the source columns.
2025View source
- 1Your water
- 2Your home
- 3Your system
Placer County Water Quality Report
Showing utility report
City of Roseville Water
2025 utility report; each result retains its measurement period
Results for City of Roseville Water in Placer 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 MRDL0.78mg/L
Distribution average; range 0.14–1.68
MRDL: 4 mg/L
Match the filter to the disinfectant used by this utility.
2025View source
TTHMs
Utility clarification neededCheck unitsNot rated
Printed value 35; unit label needs clarification
Confirm with utility
The PDF’s unit label conflicts with its benchmark. No concentration conversion is assumed.
2025View source
HAA5
Utility clarification neededCheck unitsNot rated
Printed value 25; unit label needs clarification
Confirm with utility
The PDF’s unit label conflicts with its benchmark. No concentration conversion is assumed.
2025View source
Fluoride
Below report benchmark0.67mg/L
Added-fluoride distribution average; range 0.5–0.89
California MCL: 2 mg/L
Standard filtration and softening do not establish fluoride reduction.
2025View source
Lead
90th percentile below action levelNDµg/L (ppb)
90th percentile; 52 sampled sites
Report action level: 15 µg/L
No sampled sites exceeded the report’s action level. Your household plumbing may differ.
2024View 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.
Find My Water System →Private well? Start with a current water test.
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 |
|---|---|---|
| 26 / 95 mg/L · Soft / moderately hard averages | 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.
Open the complete utility report ↗
| What was measured | Reported amount | Sample year / source date | How to read it |
|---|---|---|---|
| Hardness | 26 / 95 mg/L as CaCO₃Folsom Lake / groundwater source averages | 2025View source ↗ | Soft / moderately hard averagesGroundwater range 31–280. Test the incoming blend instead of averaging the source columns. |
| Chlorine | 0.78 mg/LDistribution average; range 0.14–1.68 | 2025View source ↗ | Reported level below MRDLMatch the filter to the disinfectant used by this utility. |
| TTHMs | Check units Not ratedPrinted value 35; unit label needs clarification | 2025View source ↗ | Utility clarification neededThe PDF’s unit label conflicts with its benchmark. No concentration conversion is assumed. |
| HAA5 | Check units Not ratedPrinted value 25; unit label needs clarification | 2025View source ↗ | Utility clarification neededThe PDF’s unit label conflicts with its benchmark. No concentration conversion is assumed. |
| Fluoride | 0.67 mg/LAdded-fluoride distribution average; range 0.5–0.89 | 2025View source ↗ | Below report benchmarkStandard filtration and softening do not establish fluoride reduction. |
| Lead | ND µg/L (ppb)90th percentile; 52 sampled sites | 2024View source ↗ | 90th percentile below action levelNo sampled sites exceeded the report’s action level. Your household plumbing may differ. |
| Total dissolved solids | 59 / 170 mg/LFolsom Lake / groundwater averages | 2023–2025View source ↗ | Below report secondary benchmarkGroundwater range 76–350. Keep the source columns separate. |
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 ↗
Turn your report into a plan for your home.
Choose the system size, keep useful existing equipment, and review your filtration goals.
Source water. Folsom Lake surface water and groundwater sources reported separately by the City of Roseville.
Email this report
Email delivery is coming soon. Copy the report link to share it now.
More about your local water
What this means for your home
Roseville lists 26 mg/L hardness for Folsom Lake supply and a 95 mg/L groundwater average.
This page follows the City of Roseville report’s separate source columns. It does not represent every supplier in Placer County. The byproduct rows need clarification from the utility before their printed values can be interpreted as concentrations.
A useful local question
Why are two byproduct cards marked for clarification?
The PDF labels TTHMs and HAA5 as ppm while printing comparison numbers normally expressed in ppb. We have not silently changed the units. Ask Roseville for clarification and use the linked original report.
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.
- City of Roseville Water ↗2025 utility report; each result retains its measurement period
- USGS hardness classification
- EPA PFAS benchmarks and implementation
Sources checked November 15, 2026
Your water → your home → your system
Turn your report into a plan for your home.
Choose the system size, keep useful existing equipment, and review your filtration goals.
Your homeFind my system →