Short answer: No measured result is above a legal limit; the water is moderately hard. East Bay Municipal Utility District serves 1,468,000 residents.
Your water bill or annual water quality report names your actual supplier.
Also supplies: Berkeley, Richmond, San Leandro, San Ramon, Alameda, Castro Valley, Danville, San Pablo, San Lorenzo, Hercules, El Cerrito, Lafayette, Ashland, Orinda, Albany, Pinole, Moraga, El Sobrante, Alamo, Emeryville, Piedmont
EAST BAY MUD (EPA PWSID CA0110005) delivers surface water to 1,468,000 residents. This report reflects 29 individual PFAS result(s) from the source UCMR5 observations and the latest Lead & Copper Rule 90th-percentile result. The utility's 2025 CCR reports moderately hard water.
0health-based violations in the last 10 years
From EPA SDWIS. A clean violation history means no enforcement action was recorded; it does not cover contaminants without a limit.
No result is not a pass. Your utility's annual water quality report may list them, and a certified lab test covers your own tap.
Plumbing inside a home can add lead that the system record can't show. A tap test tells you what reaches your glass.
3,935 galvanized lines to replace
PFHxA 3.5 ng/L, below the 400000 ng/L state limit (+1 more PFAS detected)
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
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
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.
When your results arrive, read them here →
Each card names which Oakland findings its current certification covers, and which it doesn't.
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PurityMap does not give a safe/unsafe verdict; it shows what the public records measured. For Oakland, PFAS were detected below their limits, and PFBA 5.2 ng/L with no federal or state limit. EAST BAY MUD (PWSID CA0110005) has a Purity Score of 100/100 (confidence: moderate), assessed at the water-system level and computed only from contaminants that were measured. Water can change in your own pipes, so a certified test is the only way to know what comes out of your tap.
EAST BAY MUD (PWS ID CA0110005) is the public water system on record for Oakland, California, serving about 1,468,000 people. Confirm the utility on your water bill before acting on a specific finding.
Surface water (primary source of record in EPA SDWIS).
In EPA's UCMR 5 testing (2023-04-04 to 2025-11-18), PFHxA was detected at 3.5 ng/L, below the 400,000 ng/L state limit. PFBA (5.2 ng/L) was also detected; it has no federal or state limit.
Lead is not in Oakland's current published record. Lead usually enters from a building's own pipes and fixtures, so a certified home test is the way to know yours.
PurityMap's current record for Oakland holds 32 findings: 2 detected within the reference, 1 detected with no limit and 29 not detected. Each finding links to its dated public record; a parameter that was never monitored is shown as pending, not as a pass.
Oakland's water is recorded as 5.1 gpg, moderately hard. Hardness is an aesthetic and plumbing characteristic, not a health-based limit.
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| Contaminant | Result | Benchmark | Status | Sampled | Source |
|---|---|---|---|---|---|
| Perfluorohexanoic acid (PFHxA) | 3.5 ng/L | 400,000 ng/L Michigan EGLE state MCL (strictest US state) | Within a historical reference; current applicability unverified | 2023-04-04 to 2025-11-18 | UCMR5 Analytical Results: EAST BAY MUD (CA0110005) |
| Water hardness | 5.1 gpg | Aesthetic, no federal health limit | Within a secondary/aesthetic reference | 2025 | East Bay Municipal Utility District 2025 Consumer Confidence Report (CCR) |
| Perfluorobutanoic acid (PFBA) | 5.2 ng/L | No federal or state limit; shown for transparency | Detected, no limit | 2023-04-04 to 2025-11-18 | UCMR5 Analytical Results: EAST BAY MUD (CA0110005) |
| Contaminant | Result | Benchmark | Status | Sampled | Source |
|---|---|---|---|---|---|
| 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 | 2023-04-04 to 2025-11-18 | UCMR5 Analytical Results: EAST BAY MUD (CA0110005) |
| 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 | 2023-04-04 to 2025-11-18 | UCMR5 Analytical Results: EAST BAY MUD (CA0110005) |
| 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 | 2023-04-04 to 2025-11-18 | UCMR5 Analytical Results: EAST BAY MUD (CA0110005) |
| 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 | 2023-04-04 to 2025-11-18 | UCMR5 Analytical Results: EAST BAY MUD (CA0110005) |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-04-04 to 2025-11-18 | UCMR5 Analytical Results: EAST BAY MUD (CA0110005) |
| 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 | 2023-04-04 to 2025-11-18 | UCMR5 Analytical Results: EAST BAY MUD (CA0110005) |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals) | < 5 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-04-04 to 2025-11-18 | UCMR5 Analytical Results: EAST BAY MUD (CA0110005) |
| Lead (90th percentile) | Non-Detect (ND) | 15 µg/L federal action level | Not detected above the reporting limit | 2022–2024 monitoring period | Lead & Copper Rule 90th-percentile: EAST BAY MUD (CA0110005) |
| Lithium | < 9 µg/L | 10 µg/L EPA health reference level (screening, not a legal limit)Screening level, not a legal limit | Not detected above the reporting limit | 2023-04-04 to 2025-11-18 | UCMR5 Analytical Results: EAST BAY MUD (CA0110005) |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-04-25 to 2025-12-16 | UCMR5 Analytical Results: EAST BAY MUD (CA0110005) |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | < 6 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-04-25 to 2025-12-16 | UCMR5 Analytical Results: EAST BAY MUD (CA0110005) |
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | < 20 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-04-04 to 2025-11-18 | UCMR5 Analytical Results: EAST BAY MUD (CA0110005) |
| Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-04-04 to 2025-11-18 | UCMR5 Analytical Results: EAST BAY MUD (CA0110005) |
| Perfluoro-3-methoxypropanoic acid (PFMPA) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-04-04 to 2025-11-18 | UCMR5 Analytical Results: EAST BAY MUD (CA0110005) |
| Perfluoro-4-methoxybutanoic acid (PFMBA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-04-04 to 2025-11-18 | UCMR5 Analytical Results: EAST BAY MUD (CA0110005) |
| 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 | 2023-04-04 to 2025-11-18 | UCMR5 Analytical Results: EAST BAY MUD (CA0110005) |
| Perfluorodecanoic acid (PFDA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-04-04 to 2025-11-18 | UCMR5 Analytical Results: EAST BAY MUD (CA0110005) |
| Perfluorododecanoic acid (PFDoA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-04-04 to 2025-11-18 | UCMR5 Analytical Results: EAST BAY MUD (CA0110005) |
| Perfluoroheptanesulfonic acid (PFHpS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-04-04 to 2025-11-18 | UCMR5 Analytical Results: EAST BAY MUD (CA0110005) |
| Perfluoroheptanoic acid (PFHpA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-04-04 to 2025-11-18 | UCMR5 Analytical Results: EAST BAY MUD (CA0110005) |
| Perfluorohexanesulfonic acid (PFHxS) | < 3 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-04-04 to 2025-11-18 | UCMR5 Analytical Results: EAST BAY MUD (CA0110005) |
| Perfluorononanoic acid (PFNA) | < 4 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-04-04 to 2025-11-18 | UCMR5 Analytical Results: EAST BAY MUD (CA0110005) |
| Perfluorooctanesulfonic acid (PFOS) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-04-04 to 2025-11-18 | UCMR5 Analytical Results: EAST BAY MUD (CA0110005) |
| Perfluorooctanoic acid (PFOA) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-04-04 to 2025-11-18 | UCMR5 Analytical Results: EAST BAY MUD (CA0110005) |
| Perfluoropentanesulfonic acid (PFPeS) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-04-04 to 2025-11-18 | UCMR5 Analytical Results: EAST BAY MUD (CA0110005) |
| Perfluoropentanoic acid (PFPeA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-04-04 to 2025-11-18 | UCMR5 Analytical Results: EAST BAY MUD (CA0110005) |
| Perfluorotetradecanoic acid (PFTA) | < 8 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-04-25 to 2025-12-16 | UCMR5 Analytical Results: EAST BAY MUD (CA0110005) |
| Perfluorotridecanoic acid (PFTrDA) | < 7 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-04-25 to 2025-12-16 | UCMR5 Analytical Results: EAST BAY MUD (CA0110005) |
| Perfluoroundecanoic acid (PFUnA) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-04-04 to 2025-11-18 | UCMR5 Analytical Results: EAST BAY MUD (CA0110005) |
Perfluorohexanoic acid (PFHxA)
11-Chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS)
1H, 1H, 2H, 2H-perfluorodecane sulfonic acid (8:2 FTS)
1H, 1H, 2H, 2H-perfluorohexane sulfonic acid (4:2 FTS)
1H, 1H, 2H, 2H-perfluorooctane sulfonic acid (6:2 FTS)
4,8-Dioxa-3H-perfluorononanoic acid (ADONA)
9-Chlorohexadecafluoro-3-oxanone-1-sulfonic acid (9Cl-PF3ONS)
Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals)
N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA)
N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA)
Nonafluoro-3,6-dioxaheptanoic acid (NFDHA)
Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA)
Perfluoro-3-methoxypropanoic acid (PFMPA)
Perfluoro-4-methoxybutanoic acid (PFMBA)
Perfluorobutanesulfonic acid (PFBS)
Perfluorododecanoic acid (PFDoA)
Perfluoroheptanesulfonic acid (PFHpS)
Perfluoroheptanoic acid (PFHpA)
Perfluorohexanesulfonic acid (PFHxS)
Perfluorooctanesulfonic acid (PFOS)
Perfluoropentanesulfonic acid (PFPeS)
Perfluoropentanoic acid (PFPeA)
Perfluorotetradecanoic acid (PFTA)
Perfluorotridecanoic acid (PFTrDA)
Perfluoroundecanoic acid (PFUnA)
Every value is the published result from the cited public record. A reporting limit is the lowest level the method could reliably quantify; a non-detect is not a guarantee of zero.
UCMR5 Analytical Results
UCMR5 Analytical Results: EAST BAY MUD (CA0110005)
US EPA
State SDWIS Compliance Record
Lead & Copper Rule 90th-percentile: EAST BAY MUD (CA0110005)
US EPA SDWIS
Consumer Confidence Report (CCR)
East Bay Municipal Utility District 2025 Consumer Confidence Report (CCR)
East Bay Municipal Utility District
Methodology: how we analyze water. Prepared with AI assistance and reviewed by the PurityMap Editorial Team before publication.
Start with the hot-or-cold tap check. Where East Bay Municipal Utility District reported something related, it's shown below.
Lead at East Bay Municipal Utility District: not detected (90th percentile, 2022–2024 monitoring period). Lead has no taste, so a taste neither shows nor rules it out.
A ZIP code is a postal area, not a water service area. Your water bill names your supplier.