Water Quality Report · Updated October 07, 2026
CITY OF ROSEVILLE
CITY OF ROSEVILLE delivers tap water graded C (72/100) by TapWaterSafety.org. The utility serves approximately 155,612 residents in ROSEVILLE, California using surface water. The most significant water quality concerns are: Haloacetic acids (HAA5) significantly above health guideline; Haloacetic acids (HAA9) significantly above health guideline; Total trihalomethanes (TTHMs) significantly above health guideline; Arsenic detected. For questions, the utility can be reached at 916-746-1764.
Is ROSEVILLE tap water safe to drink?
CITY OF ROSEVILLE delivers tap water that earns a grade of C (72/100) from TapWaterSafety.org — an average rating, with several contaminants above health guidelines but generally compliant with US legal limits.
The utility serves 155,612 residents in ROSEVILLE, drawing from surface water.
Public testing data identifies 11 contaminants in this water above EWG's health-based guidelines, including: Haloacetic acids (HAA5), Haloacetic acids (HAA9), Total trihalomethanes (TTHMs), Trichloroacetic acid, Chloroform, Arsenic, Dichloroacetic acid, Chromium (hexavalent), Bromodichloromethane, Nitrate, Nitrate and nitrite. For most residents, a properly certified home filter at the kitchen tap is the most cost-effective way to reduce exposure to whatever's in your water. See our filter recommendations below, matched specifically to this utility's contaminant profile.
EPA compliance record
Official U.S. EPA records for CITY OF ROSEVILLE (system ID CA3110008) for the last 3 years. Checked 2026-10-07.
Source: U.S. EPA Enforcement and Compliance History Online (ECHO), from the Safe Drinking Water Information System. See EPA's full report.
Quick actions for ROSEVILLE residents
Top concerns in this water
Based on the most recent EPA and EWG data, these are the most significant water quality issues for CITY OF ROSEVILLE.
Haloacetic acids (HAA5) significantly above health guideline
Moderate concernHaloacetic acids (HAA5) detected at 36.2 ppb, 362x above the EWG health guideline of 0.1 ppb.
Haloacetic acids (HAA9) significantly above health guideline
Moderate concernHaloacetic acids (HAA9) detected at 18.3 ppb, 304x above the EWG health guideline of 0.06 ppb.
Total trihalomethanes (TTHMs) significantly above health guideline
Moderate concernTotal trihalomethanes (TTHMs) detected at 43.3 ppb, 289x above the EWG health guideline of 0.15 ppb.
Arsenic detected
Moderate concernArsenic detected at 0.23 ppb.
Contact CITY OF ROSEVILLE
Reach the utility directly for service issues, water quality concerns, or to request your Consumer Confidence Report.
General Contact
Treatment Plant
Recommended water filters for ROSEVILLE
Filters matched to the specific contaminants in this water supply.
Carbon filter certified for VOCs (NSF/ANSI 53)
$180-$599Activated carbon is effective for disinfection byproducts. Look for NSF/ANSI 53 VOC reduction.
Reverse osmosis certified for arsenic (NSF/ANSI 58)
$429-$599Reverse osmosis certified under NSF/ANSI 58 for arsenic is the most reliable home option.
Disclosure: TapWaterSafety earns a commission from purchases made through these links. This does not influence our scoring methodology or filter selection.
Score breakdown
This utility's overall score of 72/100 breaks down across five weighted components. Read the full methodology →
Contaminants detected — international standards comparison
Every contaminant detected, compared side-by-side against US EPA legal limits, the EU Drinking Water Directive (2020/2184), WHO Guidelines, and California's Public Health Goal (the strictest US benchmark). Why we show multiple standards →
| Contaminant | Detected | EWG US health-based |
EPA US legal |
EU DWD Europe |
WHO global |
CA PHG strictest US |
Tested sample year |
Status |
|---|---|---|---|---|---|---|---|---|
| Haloacetic acids (HAA5) Disinfection byproduct |
36.2 ppb | 0.1 | 60.0 | 60 | — | — | — | 362× over |
| Haloacetic acids (HAA9) Disinfection byproduct |
18.3 ppb | 0.06 | — | — | — | — | — | 304× over |
| Total trihalomethanes (TTHMs) Disinfection byproduct |
43.3 ppb | 0.15 | 80.0 | 100 | — | — | — | 289× over |
| Trichloroacetic acid Disinfection byproduct |
14.8 ppb | 0.1 | — | — | — | — | — | 148× over |
| Chloroform Disinfection byproduct |
40.6 ppb | 0.4 | — | — | — | — | — | 101× over |
| Arsenic Heavy metal |
0.23 ppb | 0.004 | 10.0 | 10 | 10 | 0.004 | — | 58× over |
| Dichloroacetic acid Disinfection byproduct |
10.5 ppb | 0.2 | — | — | — | — | — | 52× over |
| Chromium (hexavalent) Heavy metal |
0.991 ppb | 0.02 | — | — | — | — | — | 50× over |
| Bromodichloromethane Disinfection byproduct |
2.61 ppb | 0.06 | — | — | — | — | — | 43× over |
| Nitrate Inorganic |
0.458 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 3.3× over |
| Nitrate and nitrite Inorganic |
0.357 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 2.5× over |
| Chlorate Disinfection byproduct |
135.3 ppb | 210.0 | — | — | — | — | — | Below guideline |
| Dibromochloromethane Disinfection byproduct |
0.0483 ppb | 0.1 | — | — | — | — | — | Below guideline |
| Vanadium Other |
3.53 ppb | 21.0 | — | — | — | — | — | Below guideline |
| Bromoform Disinfection byproduct |
0.0284 ppb | 0.5 | — | — | — | — | — | Below guideline |
| Manganese Heavy metal |
2.0 ppb | 100.0 | — | 50 | 80 | — | — | Below guideline |
| Monochloroacetic acid Disinfection byproduct |
0.0223 ppb | 53.0 | — | — | — | — | — | Below guideline |
| Strontium Radiological |
0.121 ppb | 1500.0 | — | — | — | — | — | Below guideline |
| Fluoride Inorganic |
0.616 ppm | — | 4.0 | 1.5 | 1.5 | — | — | Below guideline |
| Germanium Other |
0.144 ppb | — | — | — | — | — | — | Below guideline |
| Lithium Other |
7.29 ppb | — | — | — | — | — | — | Below guideline |
| Testosterone Other |
0.02 ppt | — | — | — | — | — | — | Below guideline |
All values in the unit of the detected level. Red cells indicate the detected level exceeds that standard. Some contaminants have limits in some jurisdictions but not others (shown as —). The "Tested" column shows the year each contaminant sample was collected.
Sources: US EPA, EU Drinking Water Directive 2020/2184, WHO Guidelines (4th ed.), California OEHHA PHGs, EWG Tap Water Database.
CITY OF ROSEVILLE service area
This water system serves 1 community in Placer County, California. Click any city for its dedicated tap water quality page.
Find the right filter for ROSEVILLE water
Browse filter categories by water-quality concern. Each option below is NSF-certified for the matched contaminant type.