Drinking water quality · 2023
· Verified
What's in Corona, City of — Corona, Ca, CA tap water
32 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 — 4 sit at or above that limit.
- Reporting year
- 2023
- Contaminants measured
- 32
- Over federal limit
- 4
- Approaching the limit
- 0
- Worst contaminant
- Perfluorohexanesulfonic acid
- Service area
- CA
6.8× the limit
state-level CCR
At or above the federal limit
- Perfluorohexanesulfonic acidPFAS ("forever chemicals") · Reported level0–68 ng/Llimit 3 ng/L · 6.8× the limit
- NitrateInorganic chemicals · Reported level0–20 mg/Llimit 10 mg/L · 2.0× the limit
- PFOAPFAS ("forever chemicals") · Average0–4.3 ng/Llimit 5.1 ng/L · 1.1× the limit
- PFOSPFAS ("forever chemicals") · Average0–4.2 ng/Llimit 6.5 ng/L · 1.1× the limit
PFAS ("forever chemicals")
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Perfluorohexanesulfonic acidPerfluorohexanesulfonic acid, a PFAS 'forever chemical.' | 0–68 ng/LReported levelGround Water | 3 ng/LNL | At or above the limit |
+By source (4)— Ground Water, Treated Average System Water, Colorado River Water +1 more
| |||
| 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
| |||
| PFOSPerfluorooctanesulfonic acid, a PFAS 'forever chemical' once used in firefighting foam and coatings. | 0–4.2 ng/LAverageTreated Average System Water | 6.5 ng/LNL | At or above the limit |
+By source (3)— Ground Water, Treated Average System Water, Colorado River Water
| |||
| Perfluorobutanesulfonic acidPerfluorobutanesulfonic acid, a shorter-chain PFAS 'forever chemical.' | 0–52 ng/LReported levelGround Water | 500 ng/LNL | Detected — no federal limit |
+By source (3)— Ground Water, Treated Average System Water, Colorado River Water
| |||
| 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 |
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 |
Disinfectants
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| ChloramineA longer-lasting disinfectant made by combining chlorine with ammonia. | 1.21–2.8 mg/LReported levelDistribution System Wide | None set | Within the 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. | 5 ug/L90th percentileAt the tap | None set | 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 levelTreated Average System Water | 2 mg/LMCL | Within the limit |
+By source (3)— Treated Average System Water, Ground Water, Colorado River Water
| |||
| ArsenicA naturally occurring element that also enters water from industry and agriculture. | 0–6.5Reported levelGround Water | None set | Detected — no federal limit |
+By source (3)— Ground Water, Treated Average System Water, Colorado River 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 |
| ManganeseA naturally occurring metal from soil and rock. | 0–62Reported 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 |
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 |
| HAA5Haloacetic acids — a group of five disinfection byproducts formed when disinfectants react with organic matter. | 0–28Reported levelDistribution System | None set | Detected — no federal limit |
+By source (2)— Distribution System, Distribution System Wide
| |||
| 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
| |||
| TTHMTotal trihalomethanes — a group of four chemicals (including chloroform) formed when chlorine reacts with natural organic matter. | 0–34Reported levelDistribution System Wide | None set | Detected — no federal limit |
Microbial
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Escherichia coli (E. coli)Escherichia coli — bacteria found in the gut of humans and animals. | 2024Reported levelRegulated In Distribution System | 0Public health goal | Detected — no federal limit |
Other
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Chromium | 0–8.2Reported levelGround Water | None set | Detected — no federal limit |
+By source (3)— Ground Water, Colorado River Water, Treated Average System Water
| |||
VOCs & pesticides
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| 1,2,3-TCP | 0–0.02Reported levelGround Water | None set | Detected — no federal limit |
+By source (3)— Ground Water, Treated Average System Water, Colorado River Water
| |||
| TetrachloroethyleneAn industrial solvent (PCE) used in dry cleaning and degreasing. | 0–1Reported levelGround Water | 5MCL | Detected — no federal limit |
+By source (3)— Ground Water, Treated Average System Water, Colorado River Water
| |||
| TrichloroethyleneAn industrial solvent (TCE) used in metal degreasing. | 0–1.1Reported levelGround Water | 5MCL | Detected — no federal limit |
+By source (3)— Ground Water, Treated Average System Water, Colorado River Water
| |||
Source: Corona, City of — Corona, Ca, CA's 2023 Consumer Confidence Report — the annual drinking-water report every U.S. utility is required to publish. The numbers on this page are the utility's own. A water-quality report covers an entire service area, not a single address.
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 4 contaminants at or above the federal limit: Perfluorohexanesulfonic acid, Nitrate, PFOA, and 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 Corona, City of — Corona, Ca, CA tap water?
32 contaminants were measured in Corona, City of — Corona, Ca, CA's 2023 Consumer Confidence Report, spanning metals, pfas ("forever chemicals"), and disinfection byproducts. 15 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?
4 contaminants in Corona, City of — Corona, Ca, CA's 2023 report sit at or above the federal limit: Perfluorohexanesulfonic acid (6.8× the limit); Nitrate (2.0× the limit); PFOA (1.1× the limit); PFOS (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 Perfluorohexanesulfonic acid, at 6.8× 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 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.
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