90242
Downey, CA
Los Angeles County · Los Angeles-Long Beach-Anaheim, CA metro area
CENTRAL BASIN MWD
Is tap water in Downey-Norwalk CCD (90242) safe to drink?
Source: Official EPA UCMR5 federal monitoring data. Last tested July 2025.
Township:
- Downey-Norwalk CCD, CA
Neighborhoods:
- Downey
- McCampbell
- Gage
- Downey Road
- Rio Hondo
- Laguna
The short answer for Downey-Norwalk CCD (90242)
Downey tap water has 29 contaminants above EPA guidelines, including PFOS at 11.0× the limit (tested July 2025). See the full compound-by-compound breakdown and filter recommendations.
The health risk for Downey
PFAS ('forever chemicals') have been detected above EPA limits in this water system's most recent tests. These synthetic chemicals do not break down in the body and are linked to a range of health effects. A certified filter is strongly recommended.
- PFBS, PFHpA, PFHxS, PFOA, PFOS, PFPeA above limit.
PFOS concentration (µg/L)
July 2025
0 µg/L
0.004 µg/L
0.05 µg/L
0.044 µg/L
Detected
µg/L
0.004 µg/L
EPA limit
guideline
1000% above limit
Comparison
vs. guideline
EPA limit: 0.004 µg/L | Your water: 0.044 µg/L
Certified Filters for Downey Tap Water
PFOS (a PFAS 'forever chemical') was detected above EPA limits. These filters are independently certified to reduce common drinking-water contaminants.
Pitcher filter
Epic Pure XP Water Filter Pitcher
NSF-certified dual-layer filtration reduces 70+ contaminants including PFAS, lead, chlorine, microplastics, and bacteria.
NSF/ANSI 42, 53, 401 & P473Removes 99.99% PFASMade in USABPA-free
PFAS detected in 90242 · What you can do
Here's what actually removes PFAS from your water
The right filter eliminates PFAS at the tap. But not all filters do - and the type you choose matters for your home.
Common pitchers like Brita do not remove PFAS. You need a filter independently certified to NSF P473 (for pitcher filters) or NSF/ANSI 58 (for reverse osmosis systems). All three options below carry the relevant certification.
Certified PFAS filter types - how they differ
Certified Pitcher
Removes PFAS (99%+)
No installation, works today
Lowest upfront cost (~$70)
Must refill manually
Filters only what you pour in - not cooking water
Reverse Osmosis More complete
Removes PFAS + lead, arsenic, nitrates & more
Always-on - no refilling ever
Noticeably better tasting water
Filters drinking & cooking water automatically
Higher upfront cost ($200-$400)
Choose your option
Most elevated compounds
| Compound | Measurement | EPA Limit | Comparison |
|---|---|---|---|
| PFOS Tested: July 2025 · Well 24 |
0.044 µg/L | 0.004 µg/L | 1000% above limit |
| PFPeA Tested: July 2025 · Well 5 |
0.027 µg/L | 0.003 µg/L | 800% above limit |
| PFOS Tested: July 2025 · Well 23 |
0.033 µg/L | 0.004 µg/L | 725% above limit |
| PFOS Tested: July 2025 · Well 11 |
0.029 µg/L | 0.004 µg/L | 625% above limit |
| PFPeA Tested: July 2025 · Well 17 |
0.019 µg/L | 0.003 µg/L | 533% above limit |
View all tested compounds
Well 17 · Tested: July 2025
| Compound | Measurement | EPA Limit | Comparison |
|---|---|---|---|
| PFPeA | 0.019 µg/L | 0.003 µg/L | 533% above limit |
| PFOS | 0.019 µg/L | 0.004 µg/L | 375% above limit |
| PFOA | 0.013 µg/L | 0.004 µg/L | 225% above limit |
| PFBS | 0.007 µg/L | 0.003 µg/L | 140% above limit |
| PFHpA | 0.004 µg/L | 0.003 µg/L | 37% above limit |
| PFHxS | 0.004 µg/L | 0.004 µg/L | 10% above limit |
| PFHxA | 0.014 µg/L | 3 µg/L | 0.5% of limit |
| PFBA | 0.006 µg/L | 6 µg/L | 0.1% of limit |
| lithium | <9.000 µg/L | 10 µg/L | Below limit |
| HFPO-DA | <0.005 µg/L | 0.01 µg/L | Below limit |
| PFNA | <0.004 µg/L | 0.01 µg/L | Below limit |
| 11Cl-PF3OUdS | <0.005 µg/L | 0.005 µg/L | Below limit |
| 4:2 FTS | <0.003 µg/L | 0.003 µg/L | Below limit |
| 6:2 FTS | <0.005 µg/L | 0.005 µg/L | Below limit |
| 8:2 FTS | <0.005 µg/L | 0.005 µg/L | Below limit |
| 9Cl-PF3ONS | <0.002 µg/L | 0.002 µg/L | Below limit |
| ADONA | <0.003 µg/L | 0.003 µg/L | Below limit |
| PFDA | <0.003 µg/L | 0.003 µg/L | Below limit |
| PFDoA | <0.003 µg/L | 0.003 µg/L | Below limit |
| PFHpS | <0.003 µg/L | 0.003 µg/L | Below limit |
| PFTrDA | <0.007 µg/L | 0.007 µg/L | Below limit |
| PFUnA | <0.002 µg/L | 0.002 µg/L | Below limit |
Well 24 · Tested: July 2025
| Compound | Measurement | EPA Limit | Comparison |
|---|---|---|---|
| PFOS | 0.044 µg/L | 0.004 µg/L | 1000% above limit |
| PFPeA | 0.014 µg/L | 0.003 µg/L | 367% above limit |
| PFOA | 0.015 µg/L | 0.004 µg/L | 275% above limit |
| PFBS | 0.008 µg/L | 0.003 µg/L | 163% above limit |
| PFHxS | 0.009 µg/L | 0.004 µg/L | 123% above limit |
| PFHpA | 0.004 µg/L | 0.003 µg/L | 27% above limit |
| PFHxA | 0.011 µg/L | 3 µg/L | 0.4% of limit |
| PFBA | 0.009 µg/L | 6 µg/L | 0.1% of limit |
| lithium | <9.000 µg/L | 10 µg/L | Below limit |
| HFPO-DA | <0.005 µg/L | 0.01 µg/L | Below limit |
| PFNA | <0.004 µg/L | 0.01 µg/L | Below limit |
| 11Cl-PF3OUdS | <0.005 µg/L | 0.005 µg/L | Below limit |
| 4:2 FTS | <0.003 µg/L | 0.003 µg/L | Below limit |
| 6:2 FTS | <0.005 µg/L | 0.005 µg/L | Below limit |
| 8:2 FTS | <0.005 µg/L | 0.005 µg/L | Below limit |
| 9Cl-PF3ONS | <0.002 µg/L | 0.002 µg/L | Below limit |
| ADONA | <0.003 µg/L | 0.003 µg/L | Below limit |
| PFDA | <0.003 µg/L | 0.003 µg/L | Below limit |
| PFDoA | <0.003 µg/L | 0.003 µg/L | Below limit |
| PFHpS | <0.003 µg/L | 0.003 µg/L | Below limit |
| PFTrDA | <0.007 µg/L | 0.007 µg/L | Below limit |
| PFUnA | <0.002 µg/L | 0.002 µg/L | Below limit |
Well 11 · Tested: July 2025
| Compound | Measurement | EPA Limit | Comparison |
|---|---|---|---|
| PFOS | 0.029 µg/L | 0.004 µg/L | 625% above limit |
| PFOA | 0.010 µg/L | 0.004 µg/L | 150% above limit |
| PFPeA | 0.006 µg/L | 0.003 µg/L | 107% above limit |
| PFHxS | 0.006 µg/L | 0.004 µg/L | 45% above limit |
| PFBS | 0.004 µg/L | 0.003 µg/L | 27% above limit |
| PFHxA | 0.005 µg/L | 3 µg/L | 0.2% of limit |
| lithium | <9.000 µg/L | 10 µg/L | Below limit |
| HFPO-DA | <0.005 µg/L | 0.01 µg/L | Below limit |
| PFNA | <0.004 µg/L | 0.01 µg/L | Below limit |
| PFBA | <0.005 µg/L | 6 µg/L | Below limit |
| 11Cl-PF3OUdS | <0.005 µg/L | 0.005 µg/L | Below limit |
| 4:2 FTS | <0.003 µg/L | 0.003 µg/L | Below limit |
| 6:2 FTS | <0.005 µg/L | 0.005 µg/L | Below limit |
| 8:2 FTS | <0.005 µg/L | 0.005 µg/L | Below limit |
| 9Cl-PF3ONS | <0.002 µg/L | 0.002 µg/L | Below limit |
| ADONA | <0.003 µg/L | 0.003 µg/L | Below limit |
| PFDA | <0.003 µg/L | 0.003 µg/L | Below limit |
| PFDoA | <0.003 µg/L | 0.003 µg/L | Below limit |
| PFHpA | <0.003 µg/L | 0.003 µg/L | Below limit |
| PFHpS | <0.003 µg/L | 0.003 µg/L | Below limit |
| PFTrDA | <0.007 µg/L | 0.007 µg/L | Below limit |
| PFUnA | <0.002 µg/L | 0.002 µg/L | Below limit |
Well 23 · Tested: July 2025
| Compound | Measurement | EPA Limit | Comparison |
|---|---|---|---|
| PFOS | 0.033 µg/L | 0.004 µg/L | 725% above limit |
| PFPeA | 0.010 µg/L | 0.003 µg/L | 227% above limit |
| PFOA | 0.012 µg/L | 0.004 µg/L | 200% above limit |
| PFBS | 0.007 µg/L | 0.003 µg/L | 150% above limit |
| PFHxS | 0.007 µg/L | 0.004 µg/L | 72% above limit |
| PFHxA | 0.006 µg/L | 3 µg/L | 0.2% of limit |
| PFBA | 0.010 µg/L | 6 µg/L | 0.2% of limit |
| lithium | <9.000 µg/L | 10 µg/L | Below limit |
| HFPO-DA | <0.005 µg/L | 0.01 µg/L | Below limit |
| PFNA | <0.004 µg/L | 0.01 µg/L | Below limit |
| 11Cl-PF3OUdS | <0.005 µg/L | 0.005 µg/L | Below limit |
| 4:2 FTS | <0.003 µg/L | 0.003 µg/L | Below limit |
| 6:2 FTS | <0.005 µg/L | 0.005 µg/L | Below limit |
| 8:2 FTS | <0.005 µg/L | 0.005 µg/L | Below limit |
| 9Cl-PF3ONS | <0.002 µg/L | 0.002 µg/L | Below limit |
| ADONA | <0.003 µg/L | 0.003 µg/L | Below limit |
| PFDA | <0.003 µg/L | 0.003 µg/L | Below limit |
| PFDoA | <0.003 µg/L | 0.003 µg/L | Below limit |
| PFHpA | <0.003 µg/L | 0.003 µg/L | Below limit |
| PFHpS | <0.003 µg/L | 0.003 µg/L | Below limit |
| PFTrDA | <0.007 µg/L | 0.007 µg/L | Below limit |
| PFUnA | <0.002 µg/L | 0.002 µg/L | Below limit |
Well 5 · Tested: July 2025
| Compound | Measurement | EPA Limit | Comparison |
|---|---|---|---|
| PFPeA | 0.027 µg/L | 0.003 µg/L | 800% above limit |
| PFOS | 0.014 µg/L | 0.004 µg/L | 250% above limit |
| PFBS | 0.009 µg/L | 0.003 µg/L | 197% above limit |
| PFOA | 0.011 µg/L | 0.004 µg/L | 175% above limit |
| PFHpA | 0.004 µg/L | 0.003 µg/L | 40% above limit |
| PFHxS | 0.004 µg/L | 0.004 µg/L | 92% of limit |
| PFHxA | 0.021 µg/L | 3 µg/L | 0.7% of limit |
| PFBA | 0.007 µg/L | 6 µg/L | 0.1% of limit |
| lithium | <9.000 µg/L | 10 µg/L | Below limit |
| HFPO-DA | <0.005 µg/L | 0.01 µg/L | Below limit |
| PFNA | <0.004 µg/L | 0.01 µg/L | Below limit |
| 11Cl-PF3OUdS | <0.005 µg/L | 0.005 µg/L | Below limit |
| 4:2 FTS | <0.003 µg/L | 0.003 µg/L | Below limit |
| 6:2 FTS | <0.005 µg/L | 0.005 µg/L | Below limit |
| 8:2 FTS | <0.005 µg/L | 0.005 µg/L | Below limit |
| 9Cl-PF3ONS | <0.002 µg/L | 0.002 µg/L | Below limit |
| ADONA | <0.003 µg/L | 0.003 µg/L | Below limit |
| PFDA | <0.003 µg/L | 0.003 µg/L | Below limit |
| PFDoA | <0.003 µg/L | 0.003 µg/L | Below limit |
| PFHpS | <0.003 µg/L | 0.003 µg/L | Below limit |
| PFTrDA | <0.007 µg/L | 0.007 µg/L | Below limit |
| PFUnA | <0.002 µg/L | 0.002 µg/L | Below limit |
Wells Treatment Plant · Tested: December 2024
| Compound | Measurement | EPA Limit | Comparison |
|---|---|---|---|
| PFOS | 0.019 µg/L | 0.004 µg/L | 382% above limit |
| PFOA | 0.006 µg/L | 0.004 µg/L | 55% above limit |
| PFHxS | 0.003 µg/L | 0.004 µg/L | 80% of limit |
| lithium | <9.000 µg/L | 10 µg/L | Below limit |
| HFPO-DA | <0.005 µg/L | 0.01 µg/L | Below limit |
| PFNA | <0.004 µg/L | 0.01 µg/L | Below limit |
| PFHxA | <0.003 µg/L | 3 µg/L | Below limit |
| PFBA | <0.005 µg/L | 6 µg/L | Below limit |
| 11Cl-PF3OUdS | <0.005 µg/L | 0.005 µg/L | Below limit |
| 4:2 FTS | <0.003 µg/L | 0.003 µg/L | Below limit |
| 6:2 FTS | <0.005 µg/L | 0.005 µg/L | Below limit |
| 8:2 FTS | <0.005 µg/L | 0.005 µg/L | Below limit |
| 9Cl-PF3ONS | <0.002 µg/L | 0.002 µg/L | Below limit |
| ADONA | <0.003 µg/L | 0.003 µg/L | Below limit |
| PFBS | <0.003 µg/L | 0.003 µg/L | Below limit |
| PFDA | <0.003 µg/L | 0.003 µg/L | Below limit |
| PFDoA | <0.003 µg/L | 0.003 µg/L | Below limit |
| PFHpA | <0.003 µg/L | 0.003 µg/L | Below limit |
| PFHpS | <0.003 µg/L | 0.003 µg/L | Below limit |
| PFPeA | <0.003 µg/L | 0.003 µg/L | Below limit |
| PFTrDA | <0.007 µg/L | 0.007 µg/L | Below limit |
| PFUnA | <0.002 µg/L | 0.002 µg/L | Below limit |
Treatment Plant · Tested: September 2024
| Compound | Measurement | EPA Limit | Comparison |
|---|---|---|---|
| lithium | <9.000 µg/L | 10 µg/L | Below limit |
| PFHxS | <0.003 µg/L | 0.004 µg/L | Below limit |
| HFPO-DA | <0.005 µg/L | 0.01 µg/L | Below limit |
| PFNA | <0.004 µg/L | 0.01 µg/L | Below limit |
| PFHxA | <0.003 µg/L | 3 µg/L | Below limit |
| PFBA | <0.005 µg/L | 6 µg/L | Below limit |
| 11Cl-PF3OUdS | <0.005 µg/L | 0.005 µg/L | Below limit |
| 4:2 FTS | <0.003 µg/L | 0.003 µg/L | Below limit |
| 6:2 FTS | <0.005 µg/L | 0.005 µg/L | Below limit |
| 8:2 FTS | <0.005 µg/L | 0.005 µg/L | Below limit |
| 9Cl-PF3ONS | <0.002 µg/L | 0.002 µg/L | Below limit |
| ADONA | <0.003 µg/L | 0.003 µg/L | Below limit |
| PFBS | <0.003 µg/L | 0.003 µg/L | Below limit |
| PFDA | <0.003 µg/L | 0.003 µg/L | Below limit |
| PFDoA | <0.003 µg/L | 0.003 µg/L | Below limit |
| PFHpA | <0.003 µg/L | 0.003 µg/L | Below limit |
| PFHpS | <0.003 µg/L | 0.003 µg/L | Below limit |
| PFOA | <0.004 µg/L | 0.004 µg/L | Below limit |
| PFOS | <0.004 µg/L | 0.004 µg/L | Below limit |
| PFPeA | <0.003 µg/L | 0.003 µg/L | Below limit |
| PFTrDA | <0.007 µg/L | 0.007 µg/L | Below limit |
| PFUnA | <0.002 µg/L | 0.002 µg/L | Below limit |
Water utilities serving ZIP 90242
Service area boundaries are approximate and based on state filings or modeled estimates. Contact your utility to confirm exact service at a specific address.
- CENTRAL BASIN MWDNo recent federal sampling
Modeled boundaries are shown with a dashed outline.
Frequently Asked Questions about ZIP 90242 Tap Water
What contaminants are above EPA limits in ZIP 90242?
ZIP 90242 has 29 contaminants above EPA health guidelines in the latest available data, including PFOS at 11.0x the EPA guideline. The full table on this page lists every tested compound and its measured level.
Will boiling ZIP 90242 tap water remove PFOS?
No. Boiling does not remove PFAS, and the compounds can actually become more concentrated as water evaporates. To reduce PFAS at home, use a filter independently certified to NSF/ANSI P473 (activated-carbon pitcher or under-sink) or NSF/ANSI 58 (reverse osmosis).
Do basic pitcher filters remove PFOS?
Most basic pitcher filters are only certified to NSF/ANSI 42 or 53, which do not cover PFAS. Look for a filter independently certified to NSF/ANSI P473 (activated-carbon pitcher or under-sink) or NSF/ANSI 58 (reverse osmosis) on the spec sheet.
Who provides tap water in ZIP 90242?
Public records identify CENTRAL BASIN MWD as a primary water system associated with ZIP 90242. Service boundaries can vary by address, so confirm exact service with the utility.
When was ZIP 90242 tap water last tested?
The most recent test date used in this report is July 2025. EnviroClarity last refreshed this page on 2026-05-04.
Where can I find the official water quality report for ZIP 90242?
Every U.S. public water system is required to publish an annual Consumer Confidence Report (CCR). Contact CENTRAL BASIN MWD or visit their website for the latest official report covering ZIP 90242. The EPA also maintains a national CCR locator.
Check another ZIP code
Nearby ZIP reports
Data reflects publicly reported utility records from EPA datasets and local utility disclosures. This information is educational and not medical advice.