No open EPA violations as of 2026-10-15.
EPA record checked 2026-10-06
From EPA's record for CA3310037. PurityMap is independent of City of Corona.
Every community water system publishes one each year.
Read the report ↗A ZIP code is a postal area, not a water service area. Your water bill names your supplier.
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32 results are on record. These 5 come first: results above a listed reference, then those closest to a legal limit.
| Contaminant | Result | Limit | Status | Sampled | Source |
|---|---|---|---|---|---|
| Lithium | 55.1 µg/L | 10 µg/L EPA health reference level (screening, not a legal limit)Screening level, not a legal limit | Above the referenced health-based guidance value | 2023-09-20 to 2024-09-11 | UCMR5 Analytical Results: CORONA, CITY OF (CA3310037) |
| Water hardness | 8.5 gpg | Aesthetic, no federal health limit | Above a secondary/aesthetic reference | 2026 | City of Corona 2026 Consumer Confidence Report (CCR) |
| Perfluorohexanesulfonic acid (PFHxS) | 3.3 ng/L | 10 ng/L federal MCL (2024) | At or below EPA's 2024 limit | 2023-09-20 to 2024-09-11 | UCMR5 Analytical Results: CORONA, CITY OF (CA3310037) |
| Lead (90th percentile) | 1.8 µg/L | 15 µg/L federal action level | Below the listed reference | 2024–2026 monitoring period (still open) | Lead & Copper Rule 90th-percentile: CORONA, CITY OF (CA3310037) |
| Perfluorohexanoic acid (PFHxA) | 3.8 ng/L | 400,000 ng/L Michigan EGLE state MCL (strictest US state) | Within a historical reference; current applicability unverified | 2023-09-20 to 2024-09-11 | UCMR5 Analytical Results: CORONA, CITY OF (CA3310037) |
| Perfluorobutanoic acid (PFBA) | 7.6 ng/L | No federal or state limit; shown for transparency | Detected, no limit | 2023-09-20 to 2024-09-11 | UCMR5 Analytical Results: CORONA, CITY OF (CA3310037) |
| Perfluoropentanoic acid (PFPeA) | 6.1 ng/L | No federal or state limit; shown for transparency | Detected, no limit | 2023-09-20 to 2024-09-11 | UCMR5 Analytical Results: CORONA, CITY OF (CA3310037) |
| 11-Chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-09-20 to 2024-09-11 | UCMR5 Analytical Results: CORONA, CITY OF (CA3310037) |
| 1H, 1H, 2H, 2H-perfluorodecane sulfonic acid (8:2 FTS) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-09-20 to 2024-09-11 | UCMR5 Analytical Results: CORONA, CITY OF (CA3310037) |
| 1H, 1H, 2H, 2H-perfluorohexane sulfonic acid (4:2 FTS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-09-20 to 2024-09-11 | UCMR5 Analytical Results: CORONA, CITY OF (CA3310037) |
| 1H, 1H, 2H, 2H-perfluorooctane sulfonic acid (6:2 FTS) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-09-20 to 2024-09-11 | UCMR5 Analytical Results: CORONA, CITY OF (CA3310037) |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-09-20 to 2024-09-11 | UCMR5 Analytical Results: CORONA, CITY OF (CA3310037) |
| 9-Chlorohexadecafluoro-3-oxanone-1-sulfonic acid (9Cl-PF3ONS) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-09-20 to 2024-09-11 | UCMR5 Analytical Results: CORONA, CITY OF (CA3310037) |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals) | < 5 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-09-20 to 2024-09-11 | UCMR5 Analytical Results: CORONA, CITY OF (CA3310037) |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-09-20 to 2024-09-11 | UCMR5 Analytical Results: CORONA, CITY OF (CA3310037) |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | < 6 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-09-20 to 2024-09-11 | UCMR5 Analytical Results: CORONA, CITY OF (CA3310037) |
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | < 20 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-09-20 to 2024-09-11 | UCMR5 Analytical Results: CORONA, CITY OF (CA3310037) |
| Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-09-20 to 2024-09-11 | UCMR5 Analytical Results: CORONA, CITY OF (CA3310037) |
| Perfluoro-3-methoxypropanoic acid (PFMPA) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-09-20 to 2024-09-11 | UCMR5 Analytical Results: CORONA, CITY OF (CA3310037) |
| Perfluoro-4-methoxybutanoic acid (PFMBA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-09-20 to 2024-09-11 | UCMR5 Analytical Results: CORONA, CITY OF (CA3310037) |
| Perfluorobutanesulfonic acid (PFBS) | < 3 ng/L | 2,000 ng/L EPA health advisory (screening, not a legal limit)Screening level, not a legal limit | Not detected above the reporting limit | 2023-09-20 to 2024-09-11 | UCMR5 Analytical Results: CORONA, CITY OF (CA3310037) |
| Perfluorodecanoic acid (PFDA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-09-20 to 2024-09-11 | UCMR5 Analytical Results: CORONA, CITY OF (CA3310037) |
| Perfluorododecanoic acid (PFDoA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-09-20 to 2024-09-11 | UCMR5 Analytical Results: CORONA, CITY OF (CA3310037) |
| Perfluoroheptanesulfonic acid (PFHpS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-09-20 to 2024-09-11 | UCMR5 Analytical Results: CORONA, CITY OF (CA3310037) |
| Perfluoroheptanoic acid (PFHpA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-09-20 to 2024-09-11 | UCMR5 Analytical Results: CORONA, CITY OF (CA3310037) |
| Perfluorononanoic acid (PFNA) | < 4 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-09-20 to 2024-09-11 | UCMR5 Analytical Results: CORONA, CITY OF (CA3310037) |
| Perfluorooctanesulfonic acid (PFOS) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-09-20 to 2024-09-11 | UCMR5 Analytical Results: CORONA, CITY OF (CA3310037) |
| Perfluorooctanoic acid (PFOA) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-09-20 to 2024-09-11 | UCMR5 Analytical Results: CORONA, CITY OF (CA3310037) |
| Perfluoropentanesulfonic acid (PFPeS) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-09-20 to 2024-09-11 | UCMR5 Analytical Results: CORONA, CITY OF (CA3310037) |
| Perfluorotetradecanoic acid (PFTA) | < 8 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-09-20 to 2024-09-11 | UCMR5 Analytical Results: CORONA, CITY OF (CA3310037) |
| Perfluorotridecanoic acid (PFTrDA) | < 7 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-09-20 to 2024-09-11 | UCMR5 Analytical Results: CORONA, CITY OF (CA3310037) |
| Perfluoroundecanoic acid (PFUnA) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-09-20 to 2024-09-11 | UCMR5 Analytical Results: CORONA, CITY OF (CA3310037) |
0health-based violations in the last 10 years · none open as of 2026-10-15
From EPA SDWIS. A clean violation history means no enforcement action was recorded; it does not cover contaminants without a limit. Meeting a federal limit is a compliance fact, not a health clearance.
Screening tells you if something is worth a closer look; a lab result is the number you can act on.
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Screening: quick check, not lab-grade
Safe Home (EnviroTestKits)
Lead, read as one of three ranges: 0–4, 5–15 or 15+ ppb
Turnaround: 5 minutes
What it can't tell you: It shows a lead range, not an exact level, and tests nothing else unless you pay extra for the optional lab test.
Lab-certified results
ETR Laboratories
50+ substances, including lead, copper, arsenic, nitrate, hardness and coliform bacteria
Environmental Testing and Research Laboratories (ETR Labs), Leominster, MA · ISO/IEC 17025:2017, ANAB certificate AT-2638 · 2–4 business days after the lab receives it
What it can't tell you: It does not test PFAS, and not every result on the panel falls under the lab's accredited scope.
Tested your own tap? Read your results →
Local help
Call to be connected with a local plumbing provider about lead service lines, repiping or fixture replacement.
One email when a new sampling round is published or a result moves across its reference.
Follow this water →Its official website is coronaca.gov, its phone number on EPA record is 951-736-2265 and its mailing address is 755 Public Safety Way, CORONA, CA 92878. These details come from the system's EPA record and a check of its website.
Bills, starting service and stopping service are handled by City of Corona on its official website, coronaca.gov. PurityMap does not take payments.
EPA's records list City of Corona as serving Corona, California. Your water bill names your supplier.
PurityMap's record for City of Corona holds results for 29 PFAS substances. 4 were detected, and none is above a federal legal limit. Each result links to its source in the city report.
No open EPA violations as of 2026-10-15: that is what EPA's record shows for City of Corona. The record comes from EPA's SDWIS compliance database.
City of Corona is on EPA record as drawing from surface water.
Start with the hot-or-cold tap check. Where City of Corona reported something related, it's shown below.
Lead at City of Corona: 1.8 µg/L (90th percentile, 2024–2026 monitoring period (still open)). Lead has no taste, so a taste neither shows nor rules it out.