Drinking water quality · 2022
· Verified
What's in Maywood Mutual Water Co. #1, CA tap water
20 contaminants were measured in the Maywood Mutual Water Co. #1, CA water system's 2022 annual report. Each is shown below against its federal limit — 1 sit at or above that limit.
- Reporting year
- 2022
- Contaminants measured
- 20
- Over federal limit
- 1
- Approaching the limit
- 0
- Worst contaminant
- PFOS
- Service area
- CA
Compliance history
Federal Safe Drinking Water Act violation & enforcement records (EPA SDWIS). A violation is a regulatory determination by the state or EPA — separate from the measured levels above.
- Maximum contaminant level exceededHealth-based2 violations on record · most recent Feb 1994resolved
- Monitoring1 violation on recordresolved
Source: EPA SDWIS / ECHO. View the full federal record on EPA ECHO ↗
PFAS ("forever chemicals")
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| PFOSPerfluorooctanesulfonic acid, a PFAS 'forever chemical' once used in firefighting foam and coatings. | 10.6 ng/LAverageGroundwater | None set | At or above the limit |
+By source (2)— Groundwater, MWD's Surface Water
| |||
| PFOAPerfluorooctanoic acid, a PFAS 'forever chemical' once used in nonstick and stain-resistant products. | 2 ng/LAverageGroundwater | None set | Within the limit |
+By source (2)— Groundwater, MWD's Surface Water
| |||
| Perfluorohexanesulfonic acidPerfluorohexanesulfonic acid, a PFAS 'forever chemical.' | 1.7 ng/LAverageGroundwater | None set | Within the limit |
+By source (2)— Groundwater, MWD's Surface Water
| |||
Disinfection byproducts
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| TTHMTotal trihalomethanes — a group of four chemicals (including chloroform) formed when chlorine reacts with natural organic matter. | 38.7 ug/LAverageDistribution System | None set | Within the limit |
| HAA5Haloacetic acids — a group of five disinfection byproducts formed when disinfectants react with organic matter. | 5.4 ug/LAverageDistribution System | None set | Within the limit |
Other
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Chlorine Total | 1.3 mg/LAverageDistribution System | 4 mg/LMCL | Within the limit |
Physical & aggregate
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| TurbidityA measure of cloudiness from suspended particles in the water. | 0.3 NTUAverageDistribution System | None set | Within the limit |
Inorganic chemicals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| FluorideA mineral often added to drinking water to help prevent tooth decay. | 0.7 mg/LAverageMWD's Surface Water | 4 mg/LMCL | Within the limit |
+By source (2)— MWD's Surface Water, Groundwater
| |||
| NitrateA compound from fertilizer runoff, septic systems, and erosion of natural deposits. | 0.35 mg/LAverageGroundwater | 10 mg/LMCL | Within the limit |
+By source (2)— Groundwater, MWD's Surface Water
| |||
Metals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| CopperA metal that enters water from corroding household plumbing. | 0.11 mg/L90th percentileDistribution System 90% Percentile | 1.3 mg/LAction level | Within the limit |
| BariumA metal from erosion of natural deposits and industrial discharge. | 0.15 mg/LAverageGroundwater | 2 mg/LMCL | Within the limit |
+By source (2)— Groundwater, MWD's Surface Water
| |||
| ArsenicA naturally occurring element that also enters water from industry and agriculture. | 0.6 ug/LAverageGroundwater | None set | Within the limit |
+By source (2)— Groundwater, MWD's Surface Water
| |||
| LeadA toxic metal that leaches into water from old service lines, solder, and plumbing fixtures. | 0 mg/L90th percentileAt the tap | 0.015 mg/LAction level | None detected |
| AluminumA common element sometimes used as a treatment coagulant. | 110 ug/LAverageMWD's Surface Water | None set | Detected — no federal limit |
+By source (2)— MWD's Surface Water, Groundwater
| |||
Microbial
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Escherichia coli (E. coli)Escherichia coli — bacteria found in the gut of humans and animals. | 0AverageDistribution System Average # Positive | None set | None detected |
+By source (2)— Distribution System Average # Positive, Distribution System Range Of # Positive
| |||
| Total ColiformA group of bacteria used as an indicator of overall water-system sanitation. | 0AverageDistribution System Average # Positive | 0MCLG | None detected |
+By source (2)— Distribution System Average # Positive, Distribution System Range Of # Positive
| |||
Radionuclides
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Combined RadiumCombined radium-226 and radium-228 — naturally occurring radioactive elements. | Not detectedAverageMWD's Surface Water | 5MCL | None detected |
+By source (2)— MWD's Surface Water, Groundwater
| |||
| Gross AlphaGross alpha particle activity — a combined measure of alpha-emitting radioactive substances. | Not detectedAverageGroundwater | 15MCL | Detected — no federal limit |
+By source (2)— MWD's Surface Water, Groundwater
| |||
| Gross Beta Particle ActivityGross beta particle activity — a combined measure of beta-emitting radioactive substances. | Not detectedAverageMWD's Surface Water | None set | Detected — no federal limit |
| UraniumA naturally occurring radioactive metal from erosion of natural deposits. | 0.5AverageMWD's Surface Water | 20MCL | Detected — no federal limit |
+By source (2)— MWD's Surface Water, Groundwater
| |||
People also ask about Maywood Mutual Water Co. #1, CA's water
+Is Maywood Mutual Water Co. #1, CA tap water safe to drink in 2022?
The 2022 Consumer Confidence Report for the Maywood Mutual Water Co. #1, CA water utility lists 1 contaminant at or above the federal limit: PFOS. 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 Maywood Mutual Water Co. #1, CA tap water?
20 contaminants were measured in Maywood Mutual Water Co. #1, CA's 2022 Consumer Confidence Report, spanning metals, radionuclides, and pfas ("forever chemicals"). 10 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 Maywood Mutual Water Co. #1, CA tap water?
One contaminant in Maywood Mutual Water Co. #1, CA's 2022 report sits at or above the federal limit: PFOS (2.6× 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 Maywood Mutual Water Co. #1, CA tap water?
The contaminant with the highest measured value relative to its federal limit in the 2022 report is PFOS, at 2.6× the federal threshold. It belongs to the pfas ("forever chemicals") family of contaminants.
+Where does the data on this page come from?
Every value is transcribed from Maywood Mutual Water Co. #1, CA's 2022 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 Maywood Mutual Water Co. #1, 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 2022 report; a new report will replace it once the utility publishes its next annual update.