Drinking water quality · 2023
· Verified
What's in Compton-city, Water Dept. — Compton, Ca, CA tap water
23 contaminants were measured in the Compton-city, Water Dept. — Compton, 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
- 23
- Over federal limit
- 1
- Approaching the limit
- 0
- Worst contaminant
- Cis Dichloroethylene 12
- 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.
Other
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Cis Dichloroethylene 12 | 0.3 mg/LAverageGroundwater | None set | At or above the limit |
| Chlorine Total | 1.12 mg/LRunning annual avgDistribution System Highest | 4 mg/LMCL | Within the limit |
+By source (2)— Distribution System, Distribution System Highest
| |||
Disinfection byproducts
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| TTHMTotal trihalomethanes — a group of four chemicals (including chloroform) formed when chlorine reacts with natural organic matter. | 31.3 ug/LRunning annual avgDistribution System Highest | None set | Within the limit |
+By source (2)— Distribution System, Distribution System Highest
| |||
| HAA5Haloacetic acids — a group of five disinfection byproducts formed when disinfectants react with organic matter. | 6.6 ug/LRunning annual avgDistribution System Highest | None set | Within the limit |
+By source (2)— Distribution System, Distribution System Highest
| |||
Metals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| ArsenicA naturally occurring element that also enters water from industry and agriculture. | 2.5 ug/LAverageGroundwater | None set | Within the limit |
| CopperA metal that enters water from corroding household plumbing. | 0.19 mg/L90th percentileDISTRIBUTION SYSTEM 90%ile | 1.3 mg/LAction level | Within the limit |
| BariumA metal from erosion of natural deposits and industrial discharge. | 0.09 mg/LAverageGroundwater | 2 mg/LMCL | Within the limit |
| AluminumA common element sometimes used as a treatment coagulant. | Not detected mg/LAverageGroundwater | None set | None detected |
| LeadA toxic metal that leaches into water from old service lines, solder, and plumbing fixtures. | 0 ug/L90th percentileDISTRIBUTION SYSTEM 90%ile | None set | None detected |
| Chromium, HexavalentHexavalent chromium ('chromium-6') — the more toxic form of chromium. | 0.13 ug/LAverageGroundwater | None set | Detected — no federal limit |
| LithiumA naturally occurring element found in some groundwater. | 8.75AverageSystem-wide | None set | Detected — no federal limit |
Radionuclides
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Gross AlphaGross alpha particle activity — a combined measure of alpha-emitting radioactive substances. | 3.5 pCi/LAverageGroundwater | 15 pCi/LMCL | Within the limit |
| UraniumA naturally occurring radioactive metal from erosion of natural deposits. | 3.2 ug/LAverageGroundwater | 30 ug/LMCL | Within the limit |
| Combined RadiumCombined radium-226 and radium-228 — naturally occurring radioactive elements. | Not detected pCi/LRangeGroundwater | 5 pCi/LMCL | None detected |
VOCs & pesticides
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| TrichloroethyleneAn industrial solvent (TCE) used in metal degreasing. | 0.4 ug/LAverageGroundwater | 5 ug/LMCL | Within the limit |
| TetrachloroethyleneAn industrial solvent (PCE) used in dry cleaning and degreasing. | 0.2 ug/LAverageGroundwater | 5 ug/LMCL | Within the limit |
Inorganic chemicals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| FluorideA mineral often added to drinking water to help prevent tooth decay. | 0.3 mg/LAverageGroundwater | 4 mg/LMCL | Within the limit |
| NitrateA compound from fertilizer runoff, septic systems, and erosion of natural deposits. | 0.3 mg/LAverageGroundwater | 10 mg/LMCL | Within the limit |
PFAS ("forever chemicals")
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| PFOSPerfluorooctanesulfonic acid, a PFAS 'forever chemical' once used in firefighting foam and coatings. | 0.0014 ng/LAverageSystem-wide | None set | Within the limit |
| PFOAPerfluorooctanoic acid, a PFAS 'forever chemical' once used in nonstick and stain-resistant products. | 0.00062 ng/LAverageSystem-wide | None set | Within the limit |
| Perfluorohexanesulfonic acidPerfluorohexanesulfonic acid, a PFAS 'forever chemical.' | 0.0004 ng/LAverageSystem-wide | None set | Within the limit |
Microbial
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Escherichia coli (E. coli)Escherichia coli — bacteria found in the gut of humans and animals. | 0 %AverageDistribution System Average % Positive | None set | None detected |
+By source (2)— Distribution System Average % Positive, Distribution System Range %
| |||
| Total ColiformA group of bacteria used as an indicator of overall water-system sanitation. | 0.3 %AverageDistribution System Average % Positive | None set | Detected — no federal limit |
+By source (2)— Distribution System Range %, Distribution System Average % Positive
| |||
People also ask about Compton-city, Water Dept. — Compton, Ca, CA's water
+Is Compton-city, Water Dept. — Compton, Ca, CA tap water safe to drink in 2023?
The 2023 Consumer Confidence Report for the Compton-city, Water Dept. — Compton, Ca, CA water utility lists 1 contaminant at or above the federal limit: Cis Dichloroethylene 12. 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 Compton-city, Water Dept. — Compton, Ca, CA tap water?
23 contaminants were measured in Compton-city, Water Dept. — Compton, Ca, CA's 2023 Consumer Confidence Report, spanning metals, pfas ("forever chemicals"), and radionuclides. 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 Compton-city, Water Dept. — Compton, Ca, CA tap water?
One contaminant in Compton-city, Water Dept. — Compton, Ca, CA's 2023 report sits at or above the federal limit: Cis Dichloroethylene 12 (4.3× 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 Compton-city, Water Dept. — Compton, Ca, CA tap water?
The contaminant with the highest measured value relative to its federal limit in the 2023 report is Cis Dichloroethylene 12, at 4.3× the federal threshold. It belongs to the other family of contaminants.
+Where does the data on this page come from?
Every value is transcribed from Compton-city, Water Dept. — Compton, 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 Compton-city, Water Dept. — Compton, 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.