Drinking water quality · 2023
What's in Corona, City of — Corona, Ca, CA tap water
24 contaminants were measured in the Corona, City of — Corona, Ca, CA water system's 2023 annual report. Each is shown below against its federal limit — 2 sit at or above that limit.
- Reporting year
- 2023
- Contaminants measured
- 24
- Over federal limit
- 2
- Approaching the limit
- 0
- Worst contaminant
- Nitrate
- 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-based10 violations on record · most recent Jun 2001resolved
- Treatment technique violationHealth-based1 violation on record · most recent Jul 1993resolved
Source: EPA SDWIS / ECHO. View the full federal record on EPA ECHO ↗
Inorganic chemicals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| NitrateA compound from fertilizer runoff, septic systems, and erosion of natural deposits. | 0–20 mg/LReported levelGround Water | 10 mg/LMCL | At or above the limit |
+By source (3)— Ground Water, Treated Average System Water, Colorado River Water
| |||
| FluorideA mineral often added to drinking water to help prevent tooth decay. | 0.26–2 mg/LReported levelGround Water | 4 mg/LMCL | Within the limit |
+By source (3)— Ground Water, Treated Average System Water, Colorado River Water
| |||
| BromideA naturally occurring salt found in source water. | 0–32Reported levelDistribution System | None set | Detected — no federal limit |
PFAS ("forever chemicals")
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| PFOAPerfluorooctanoic acid, a PFAS 'forever chemical' once used in nonstick and stain-resistant products. | 0–4.3 ng/LAverageTreated Average System Water | 5.1 ng/LNL | At or above the limit |
+By source (3)— Ground Water, Treated Average System Water, Colorado River Water
| |||
| Perfluorohexanesulfonic acidPerfluorohexanesulfonic acid, a PFAS 'forever chemical.' | 0–0.0033 ng/LReported levelDistribution System | None set | Within the limit |
| Perfluorohexanoic acidPerfluorohexanoic acid, a shorter-chain PFAS 'forever chemical.' | 0–0.0038Reported levelDistribution System | None set | Detected — no federal limit |
| Perfluoropentanoic acidPerfluoropentanoic acid, a shorter-chain PFAS 'forever chemical.' | 0–0.0061Reported levelDistribution System | None set | Detected — no federal limit |
| PFBAPerfluorobutanoic acid, a shorter-chain PFAS 'forever chemical.' | 0–0.0076Reported levelDistribution System | 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. | 0–7.5 pCi/LReported levelGround Water | 15 pCi/LMCL | Within the limit |
+By source (2)— Ground Water, Colorado River Water
| |||
| UraniumA naturally occurring radioactive metal from erosion of natural deposits. | 0–16.8 pCi/LReported levelGround Water | 20 pCi/LMCL | Detected — no federal limit |
+By source (2)— Ground Water, Colorado River Water
| |||
Metals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| LeadA toxic metal that leaches into water from old service lines, solder, and plumbing fixtures. | 0.0037 mg/L90th percentileAt the tap | 0.015 mg/LAction level | Within the limit |
| CopperA metal that enters water from corroding household plumbing. | 0.17 mg/L90th percentileAt the tap | 1.3 mg/LAction level | Within the limit |
| BariumA metal from erosion of natural deposits and industrial discharge. | 0–0.13 mg/LReported levelGround Water | 2 mg/LMCL | Within the limit |
+By source (3)— Ground Water, Treated Average System Water, Colorado River Water
| |||
| ArsenicA naturally occurring element that also enters water from industry and agriculture. | Not detected mg/LReported levelState Project Water | None set | None detected |
+By source (2)— Ground Water, Treated Average System Water
| |||
| BoronA naturally occurring element from rock and soil. | 0.29–3.4 mg/LReported levelGround Water | 1 mg/LNL | Detected — no federal limit |
+By source (3)— Ground Water, Treated Average System Water, Colorado River Water
| |||
| LithiumA naturally occurring element found in some groundwater. | 0–55.1Reported levelDistribution System | None set | Detected — no federal limit |
| Vanadium | 0–19Reported levelGround Water | 50NL | Detected — no federal limit |
+By source (3)— Ground Water, Treated Average System Water, Colorado River Water
| |||
Physical & aggregate
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| TurbidityA measure of cloudiness from suspended particles in the water. | 0.08 NTUReported levelSystem-wide | None set | Within the limit |
| TOCTotal organic carbon — a measure of organic material dissolved in the water. | 0–2600Reported levelDistribution System | None set | Detected — no federal limit |
Other
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Chromium | Not detected mg/LReported levelColorado River Water | None set | None detected |
+By source (3)— Colorado River Water, Ground Water, Treated Average System Water
| |||
| Pce | 0–1Reported levelGround Water | None set | Detected — no federal limit |
+By source (3)— Colorado River Water, Treated Average System Water, Ground Water
| |||
| Tce | 0–1.1Reported levelGround Water | None set | Detected — no federal limit |
+By source (3)— Colorado River Water, Treated Average System Water, Ground Water
| |||
Disinfection byproducts
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| BromateA disinfection byproduct formed when bromide-containing water is treated with ozone. | 0–19Reported levelDistribution System Wide | None set | Detected — no federal limit |
| PerchlorateA chemical used in rocket fuel and fireworks that can also form during disinfection. | 0–9.4Reported levelGround Water | None set | Detected — no federal limit |
+By source (3)— Ground Water, Treated Average System Water, Colorado River Water
| |||
People also ask about Corona, City of — Corona, Ca, CA's water
+Is Corona, City of — Corona, Ca, CA tap water safe to drink in 2023?
The 2023 Consumer Confidence Report for the Corona, City of — Corona, Ca, CA water utility lists 2 contaminants at or above the federal limit: Nitrate and PFOA. 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 Corona, City of — Corona, Ca, CA tap water?
24 contaminants were measured in Corona, City of — Corona, Ca, CA's 2023 Consumer Confidence Report, spanning metals, pfas ("forever chemicals"), and inorganic 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 Corona, City of — Corona, Ca, CA tap water?
2 contaminants in Corona, City of — Corona, Ca, CA's 2023 report sit at or above the federal limit: Nitrate (2.0× the limit); PFOA (1.1× 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 Corona, City of — Corona, Ca, CA tap water?
The contaminant with the highest measured value relative to its federal limit in the 2023 report is Nitrate, at 2.0× the federal threshold. It belongs to the inorganic chemicals family of contaminants.
+Where does the data on this page come from?
Every value is transcribed from Corona, City of — Corona, 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 Corona, City of — Corona, 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.