Santa Rosa Tap Water Quality Report
Santa Rosa's water has 2 contaminants above EPA MCLGs. Consider using a certified water filter for additional protection.
Other systems listed for Santa Rosa with results above guidelines: HOLLAND HEIGHTS MUTUAL WATER COMPANY (2 above guidelines), EVERGREEN MOBILE ESTATES (1 above guidelines), SONOMA RANCH MUTUAL WATER COMPANY (1 above guidelines)
People Served
175,775
Health-based violations since 2020
0
SANTA ROSA, CITY OF. EPA SDWA violation data as of Q2 2026 (downloaded 2026-07-09).
Latest sample on file
Oct 2025 · SANTA ROSA, CITY OF
Utilities publish newer results in their annual water quality report (Consumer Confidence Report).
Is Santa Rosa Tap Water Safe to Drink?
We recommend using a certified water filter for additional protection, especially for vulnerable populations like children, pregnant women, and those with compromised immune systems. Santa Rosa's water has 2 contaminants above EPA health-based guidelines (MCLGs), while it meets federal legal limits.
SANTA ROSA, CITY OF, Santa Rosa's water system, serves 175,775 people. 14 other systems are listed for Santa Rosa. Each system's results are listed under its own name, never added to SANTA ROSA, CITY OF's. Water quality testing is conducted regularly and reported to the EPA. The latest sample on file for SANTA ROSA, CITY OF is from Oct 2025.
In EPA's 2023–2026 UCMR 5 testing, SANTA ROSA, CITY OF measured lithium at up to 96 µg/L, which EPA counts as above its health reference level of 10 µg/L. That level is a screening value EPA uses to decide what to study further, not a legal limit, and this result does not change this page's water-quality summary.
Boil water advisories are issued by water systems and state agencies, and they change from day to day. Boil water advisories in California
Santa Rosa Water Service Areas
What these numbers actually mean for Santa Rosa, CA
We read Santa Rosa, CA’s published record and send you a short report — which findings warrant a decision, which to ignore, and what to do about it. Including when the answer is nothing.
- 2 contaminants above EPA MCLGs and 4 contaminants with an EPA health goal detected in some samples (no level on file)
- 215 results on file
- 23 PFAS compounds on record
Buying a home here? Property Water Report — $49 Emailed within one business day.
Fluoride in Santa Rosa's water
The 5 largest of the 15 water systems serving Santa Rosa, by population served.
SANTA ROSA, CITY OF
PWSID CA4910009
SANTA ROSA, CITY OF reported 0.2 mg/L, below the 0.7 mg/L U.S. Public Health Service recommendation.
CANON MANOR WATER SYSTEM
PWSID CA4910022
No fluoride level in our data for CANON MANOR WATER SYSTEM. Your utility's annual water quality report (CCR) lists it.
RINCON VALLEY MOBILE ESTATES
PWSID CA4900600
No fluoride level in our data for RINCON VALLEY MOBILE ESTATES. Your utility's annual water quality report (CCR) lists it.
LEISURE MOBILE HOME PARK
PWSID CA4900832
No fluoride level in our data for LEISURE MOBILE HOME PARK. Your utility's annual water quality report (CCR) lists it.
BROOKWOOD MOBILE HOME PARK
PWSID CA4900687
No fluoride level in our data for BROOKWOOD MOBILE HOME PARK. Your utility's annual water quality report (CCR) lists it.
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Recommended Water Filters for Santa Rosa
Based on Santa Rosa's water quality data, these NSF-certified filters are recommended to remove contaminants above EPA MCLGs.
Culligan
ZeroWater
NSF Certified:
Flow Rate
1.9 gpm
Daily Production
1 gpd
Highlights:
- Compact design
- Easy to set up
- Affordable
- NSF-42, NSF-53, NSF-401 certified
Removes 19 contaminants:
+14 more
Strontium, Molybdenum, Fluoride, Uranium, Lead, Total PFAS, Chlorine, 25, Phosphorus, Bicarbonate, Calcium, Carbonate, Magnesium, Sodium
Santevia
Bath Filter
NSF Certified:
Flow Rate
0.36 gpm
Highlights:
- Organic cotton design reduces plastic used in construction
- Affordable upfront & ongoing cost
- The only bath filter that removed 100% chlorine with “normal” faster faucet flow
Removes 1 contaminants:
Waterdrop
A1
NSF Certified:
Flow Rate
1 gpm
Highlights:
- Performance certified
- Lower price than Philips
- Hot water dispensing
- Compact design
Removes 5 contaminants:
Whirlpool Corporation
W11256135
NSF Certified:
Capacity
1001 gal
Filter Life
3 mo
Flow Rate
0.7 gpm
Removes 19 contaminants:
+14 more
Benzene, Carbofuran, Chlorine (Free), Chlorine (Total), Chlorine Dioxide, Chlorobenzene, Cryptosporidium, Ethylbenzene, Lead, Mercury, Metolachlor, Tetrachloroethylene, Toxaphene, Turbidity
Test Your Water Quality
Professional laboratory testing provides accurate, detailed analysis of your drinking water.
SimpleLab
Advanced Home Water Test
$269
Comprehensive water analysis testing over 200 contaminants including bacteria, heavy metals, and chemical compounds.
Tap Score
Advanced Microplastics Test
$829
Cutting-edge testing for microplastics particles in drinking water using advanced laboratory techniques.
Tap Score
Haloacetic Acids (HAA9) Test
$275
Tests for disinfection byproducts formed when chlorine reacts with organic matter in water treatment.
What Santa Rosa's water readings can explain
Utility-reported data for Santa Rosa includes a chlorine-based disinfectant — the readings behind these common tap water questions. We publish a city-level hardness figure for Santa Rosa, resolved from its water systems where they report one and estimated from county sampling where they do not. Each page starts with the hot-tap and cold-tap check, then shows what your own water system reported.
On a private well near Santa Rosa? Public-water results do not apply to private wells. See Sonoma County well water testing and USGS risk data — modeled arsenic, nitrate, and the tests to run.
Water softener cost and installation in Santa Rosa
Santa Rosa's tap water measures 7.1 grains per gallon (121.0 mg/L) — hard on the USGS scale, the range where scale on fixtures and appliances is the usual complaint.
Water softener cost for 7.1 gpg water in Santa Rosa — equipment and local installation labour for your ZIP code, with the sizing arithmetic shown in full. For the national picture first, read what a water softener costs — equipment, installation labour and ten-year ownership, each separated out. For California as a whole, read water softener cost in California — priced against the plumber wage published for the state.
Frequently Asked Questions About Santa Rosa Tap Water
Santa Rosa's water has 2 contaminants above EPA MCLGs. While the water meets federal legal limits, we recommend using a certified water filter for additional protection, especially for vulnerable populations like children, pregnant women, and those with compromised immune systems.
Spotted something off on this page?
Residents keep our data honest.
This form corrects our data; it does not reach SANTA ROSA, CITY OF. For a problem with your water now (discolored water, no water, low pressure, a leak), contact SANTA ROSA, CITY OF directly.
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