Drinking water quality · 2023
· Verified
What's in North Marin Water District — Novato, Ca, CA tap water
19 contaminants were measured in the North Marin Water District — Novato, Ca, CA water system's 2023 annual report. Each is shown below against its federal limit — 1 sit at or above that limit.
- Reporting year
- 2023
- Contaminants measured
- 19
- Over federal limit
- 1
- Approaching the limit
- 1
- Worst contaminant
- Lead
- Service area
- CA
Metals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| LeadA toxic metal that leaches into water from old service lines, solder, and plumbing fixtures. | 30 ug/LAverageSonoma County Water Agency | 0.2 ug/LPublic health goal | At or above the limit |
| CopperA metal that enters water from corroding household plumbing. | 30 ug/LAverageSonoma County Water Agency | 300 ug/LPublic health goal | Within the limit |
| ArsenicA naturally occurring element that also enters water from industry and agriculture. | Not detected ug/LAverageStafford Water Treatment Plant | 0.004 ug/LPublic health goal | Within the limit |
+By source (2)— Stafford Water Treatment Plant, Sonoma County Water Agency
| |||
| BariumA metal from erosion of natural deposits and industrial discharge. | Not detected mg/LAverageSonoma County Water Agency | 2 mg/LPublic health goal | Within the limit |
+By source (2)— Stafford Water Treatment Plant, Sonoma County Water Agency
| |||
Disinfection byproducts
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| TTHMTotal trihalomethanes — a group of four chemicals (including chloroform) formed when chlorine reacts with natural organic matter. | 0–73 ug/LRangeSonoma County Water Agency | None set | Approaching the limit |
| HAA5Haloacetic acids — a group of five disinfection byproducts formed when disinfectants react with organic matter. | 0–37 ug/LRangeSonoma County Water Agency | None set | Within the limit |
Other
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Chlorine Free | 0.73 mg/LAverageSonoma County Water Agency | None set | Within the limit |
Inorganic chemicals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| FluorideA mineral often added to drinking water to help prevent tooth decay. | Not detected mg/LAverageSonoma County Water Agency | 1 mg/LPublic health goal | Within the limit |
+By source (2)— Stafford Water Treatment Plant, Sonoma County Water Agency
| |||
| NitrateA compound from fertilizer runoff, septic systems, and erosion of natural deposits. | Not detected mg/LAverageSonoma County Water Agency | 10 mg/LPublic health goal | None detected |
+By source (2)— Sonoma County Water Agency, Stafford Water Treatment Plant
| |||
PFAS ("forever chemicals")
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Hexafluoropropylene oxide dimer acidHFPO-DA ('GenX chemicals'), a newer-generation PFAS replacement compound. | Not detected ng/LRangeNorth Marin Water District | 10 ng/LMCLG | None detected |
| Perfluorobutanesulfonic acidPerfluorobutanesulfonic acid, a shorter-chain PFAS 'forever chemical.' | Not detected ng/LAverageNorth Marin Water District | 500 ng/LNL | None detected |
| Perfluoroheptanoic acidPerfluoroheptanoic acid, a PFAS 'forever chemical.' | Not detected ng/LRangeNorth Marin Water District | None set | None detected |
| Perfluorohexanesulfonic acidPerfluorohexanesulfonic acid, a PFAS 'forever chemical.' | Not detected ng/LRangeNorth Marin Water District | 3 ng/LNL | None detected |
| Perfluorononanoic acidPerfluorononanoic acid, a PFAS 'forever chemical.' | Not detected ng/LAverageNorth Marin Water District | 10 ng/LMCLG | None detected |
| PFOAPerfluorooctanoic acid, a PFAS 'forever chemical' once used in nonstick and stain-resistant products. | Not detected ng/LRangeNorth Marin Water District | 5.1 ng/LNL | None detected |
| PFOSPerfluorooctanesulfonic acid, a PFAS 'forever chemical' once used in firefighting foam and coatings. | Not detected ng/LAverageNorth Marin Water District | 6.5 ng/LNL | None detected |
Radionuclides
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Gross AlphaGross alpha particle activity — a combined measure of alpha-emitting radioactive substances. | Not detected pCi/LAverageStafford Water Treatment Plant | 0 pCi/LPublic health goal | None detected |
+By source (2)— Stafford Water Treatment Plant, Sonoma County Water Agency
| |||
Microbial
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Escherichia coli (E. coli)Escherichia coli — bacteria found in the gut of humans and animals. | 971 %AverageSonoma County Water Agency | 0 %Public health goal | Detected — no federal limit |
| Total ColiformA group of bacteria used as an indicator of overall water-system sanitation. | 971 %AverageSonoma County Water Agency | None set | Detected — no federal limit |
People also ask about North Marin Water District — Novato, Ca, CA's water
+Is North Marin Water District — Novato, Ca, CA tap water safe to drink in 2023?
The 2023 Consumer Confidence Report for the North Marin Water District — Novato, Ca, CA water utility lists 1 contaminant at or above the federal limit: Lead. Whether that means the water is "unsafe" depends on which contaminant, how long the exposure, and individual health factors. The table on this page shows the measured value, the federal threshold, and the regulated statistic used for compliance.
+What contaminants are in North Marin Water District — Novato, Ca, CA tap water?
19 contaminants were measured in North Marin Water District — Novato, Ca, CA's 2023 Consumer Confidence Report, spanning pfas ("forever chemicals"), metals, and disinfection byproducts. 14 have an enforceable federal limit; the rest are detected but unregulated. Every measured value, in the utility's own units, is on this page.
+Which contaminants exceed federal limits in North Marin Water District — Novato, Ca, CA tap water?
One contaminant in North Marin Water District — Novato, Ca, CA's 2023 report sits at or above the federal limit: Lead (2.0× the limit). The EPA enforces these limits against the regulated reporting statistic — typically a running annual average or 90th percentile — not a one-off sample spike.
+What is the worst contaminant in North Marin Water District — Novato, Ca, CA tap water?
The contaminant with the highest measured value relative to its federal limit in the 2023 report is Lead, at 2.0× the federal threshold. It belongs to the metals family of contaminants.
+Are any contaminants in North Marin Water District — Novato, Ca, CA tap water approaching the federal limit?
One contaminant is between 80% and 100% of the federal limit in this report: TTHM. Approaching means measured but not in violation — a margin that can close quickly if conditions change.
+Where does the data on this page come from?
Every value is transcribed from North Marin Water District — Novato, Ca, CA's 2023 Consumer Confidence Report — the annual drinking-water report every U.S. public water utility is required by federal law to publish. The original source document is archived and viewable on this site. A water-quality report covers an entire service area, not a single address.
+How often is North Marin Water District — Novato, Ca, CA's water quality data updated?
Each U.S. public water utility publishes one Consumer Confidence Report per year, covering the prior calendar year's measurements. This page reflects the 2023 report; a new report will replace it once the utility publishes its next annual update.