Drinking water quality · 2021
· Verified
What's in Marin Municipal Water District — Corte Madera, Ca, CA tap water
13 contaminants were measured in the Marin Municipal Water District — Corte Madera, Ca, CA water system's 2021 annual report. Each is shown below against its federal limit.
- Reporting year
- 2021
- Contaminants measured
- 13
- Over federal limit
- 0
- Approaching the limit
- 0
- Service area
- CA
Disinfection byproducts
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| TTHMTotal trihalomethanes — a group of four chemicals (including chloroform) formed when chlorine reacts with natural organic matter. | 63 ug/LAverageSite Average | None set | Within the limit |
| HAA5Haloacetic acids — a group of five disinfection byproducts formed when disinfectants react with organic matter. | 26 ug/LAverageSite Average | None set | Within the limit |
+By source (2)— Reservoir Water, Site Average
| |||
Disinfectants
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| ChloramineA longer-lasting disinfectant made by combining chlorine with ammonia. | 1.71 mg/LAverageSystem-wide | 4 mg/LMRDLG | Within the limit |
Inorganic chemicals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| FluorideA mineral often added to drinking water to help prevent tooth decay. | 0.71 mg/LAverageSystem-wide | 0.6 mg/LTreatment technique | Within the limit |
| NitrateA compound from fertilizer runoff, septic systems, and erosion of natural deposits. | Not detected mg/LAverageSystem-wide | 10 mg/LPublic health goal | Within the limit |
| BromideA naturally occurring salt found in source water. | 31 ug/LAverageReservoir Water | None set | Detected — no federal limit |
Physical & aggregate
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| TurbidityA measure of cloudiness from suspended particles in the water. | 0.11 NTUReported levelSystem-wide | 1 NTUTreatment technique | Within the limit |
| pHA measure of how acidic or basic the water is. | 8.1AverageSystem-wide | None set | Detected — no federal limit |
| TOCTotal organic carbon — a measure of organic material dissolved in the water. | 2.9 mg/LAverageReservoir Water | None set | Detected — no federal limit |
Metals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| CopperA metal that enters water from corroding household plumbing. | 0.13 mg/L90th percentileAt the tap | 0.3 mg/LPublic health goal | Within the limit |
| LeadA toxic metal that leaches into water from old service lines, solder, and plumbing fixtures. | Not detected ug/L90th percentileAt the tap | 0.2 ug/LPublic health goal | None detected |
| ManganeseA naturally occurring metal from soil and rock. | 2.8 ug/LAverageReservoir Water | 500 ug/LNL | Detected — no federal limit |
+By source (2)— Reservoir Water, SCWA Water
| |||
Microbial
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Total ColiformA group of bacteria used as an indicator of overall water-system sanitation. | 1.2 %MaximumMonthly | 0 %MCLG | Detected — no federal limit |
People also ask about Marin Municipal Water District — Corte Madera, Ca, CA's water
+Is Marin Municipal Water District — Corte Madera, Ca, CA tap water safe to drink in 2021?
Every one of the 13 contaminants measured in Marin Municipal Water District — Corte Madera, Ca, CA's 2021 Consumer Confidence Report is below its federal limit. "Safe" under the EPA's drinking-water standards is health-based, not aesthetic — but by those standards, no measured contaminant in this report exceeds its enforceable threshold. Individual health concerns (e.g. immunocompromised, infant, pregnancy) may warrant additional filtering regardless of compliance.
+What contaminants are in Marin Municipal Water District — Corte Madera, Ca, CA tap water?
13 contaminants were measured in Marin Municipal Water District — Corte Madera, Ca, CA's 2021 Consumer Confidence Report, spanning inorganic chemicals, metals, and physical & aggregate. 8 have an enforceable federal limit; the rest are detected but unregulated. Every measured value, in the utility's own units, is on this page.
+Where does the data on this page come from?
Every value is transcribed from Marin Municipal Water District — Corte Madera, Ca, CA's 2021 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 Marin Municipal Water District — Corte Madera, 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 2021 report; a new report will replace it once the utility publishes its next annual update.