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Review government records associated with Los Alamitos, California.
Toxin Scout is in beta. Please verify important findings with the linked sources.
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Preparing Los Alamitos environmental records...
Start with the annual water quality report from the utility serving your address. EPA calls this a Consumer Confidence Report; it explains source water, detected substances and reported violations for its reporting period. Check the utility separately for current advisories or service notices, since an annual summary does not describe conditions at every tap today.
Check your water bill for your utility name and confirm the reporting year. See EPA’s guide to finding your annual water quality report.
Public water-system records for Los Alamitos, CA from EPA SDWIS.
Downey - City, Water Dept.
Active health-based drinking-water issue detected in EPA SDWIS.
Reviewed: active/open records as of Q1 2026
City-area ZIP code · Serves 110,556 people
Lakewood - City, Water Dept.
PFAS above an official threshold detected in available EPA records.
Reviewed: active/open records as of Q1 2026
City-area ZIP code · Serves 66,135 people
City of Anaheim
Active monitoring or reporting issue detected in EPA SDWIS.
Reviewed: active/open records as of Q1 2026
City-area ZIP code · Serves 348,593 people
Data from EPA SDWIS
PFAS screening separates EPA UCMR5 drinking-water monitoring from nearby DoD PFAS investigation-site records; EPA samples shown are from Nov 2024 to Nov 2025.
Drinking Water PFAS Monitoring
EPA UCMR5 samples public water systems. These results are separate from nearby PFAS cleanup or investigation-site records.
35 PFAS sample results above EPA limits
Sample period: Nov 2024 to Nov 2025
UCMR5 results are sampled by public water system, not every household. Confirm your water provider before treating these as tap-water results for a specific address.
| Chemical | Concentration (µg/L) | EPA Limit (µg/L) | Sample date | Over Limit |
|---|---|---|---|---|
| PFOS | 0.0440 | 0.0040 | 2025-07-01 | Yes |
| PFOS | 0.0380 | 0.0040 | 2025-01-14 | Yes |
| PFOS | 0.0330 | 0.0040 | 2025-07-01 | Yes |
| PFOS | 0.0320 | 0.0040 | 2025-01-14 | Yes |
| PFOS | 0.0290 | 0.0040 | 2025-07-01 | Yes |
| PFOS | 0.0270 | 0.0040 | 2025-01-14 | Yes |
| PFOS | 0.0190 | 0.0040 | 2025-07-01 | Yes |
| PFOA | 0.0150 | 0.0040 | 2025-07-01 | Yes |
| PFOS | 0.0140 | 0.0040 | 2025-07-01 | Yes |
| PFOS | 0.0140 | 0.0040 | 2025-01-14 | Yes |
| PFOA | 0.0130 | 0.0040 | 2025-07-01 | Yes |
| PFOA | 0.0120 | 0.0040 | 2025-07-01 | Yes |
| PFOS | 0.0120 | 0.0040 | 2025-01-14 | Yes |
| PFOA | 0.0120 | 0.0040 | 2025-01-14 | Yes |
| PFOA | 0.0110 | 0.0040 | 2025-01-14 | Yes |
| PFOA | 0.0110 | 0.0040 | 2025-07-01 | Yes |
| PFOA | 0.0100 | 0.0040 | 2025-01-14 | Yes |
| PFOA | 0.0100 | 0.0040 | 2025-07-01 | Yes |
| PFOA | 0.0086 | 0.0040 | 2025-01-14 | Yes |
| PFOA | 0.0083 | 0.0040 | 2025-01-14 | Yes |
| PFOS | 0.0167 | 0.0040 | 2025-11-25 | Yes |
| PFOS | 0.0078 | 0.0040 | 2025-11-25 | Yes |
| PFOS | 0.0290 | 0.0040 | 2024-11-05 | Yes |
| PFOS | 0.0254 | 0.0040 | 2024-11-05 | Yes |
| PFOS | 0.0181 | 0.0040 | 2025-05-05 | Yes |
| PFOS | 0.0176 | 0.0040 | 2024-11-05 | Yes |
| PFHxS | 0.0109 | 0.0100 | 2024-11-05 | Yes |
| PFHxS | 0.0107 | 0.0100 | 2025-05-05 | Yes |
| PFOA | 0.0101 | 0.0040 | 2024-11-05 | Yes |
| PFHxS | 0.0101 | 0.0100 | 2024-11-05 | Yes |
| PFOA | 0.0092 | 0.0040 | 2025-05-05 | Yes |
| PFOA | 0.0089 | 0.0040 | 2024-11-05 | Yes |
| PFOA | 0.0068 | 0.0040 | 2024-11-05 | Yes |
| PFOS | 0.0056 | 0.0040 | 2024-11-06 | Yes |
| PFOS | 0.0055 | 0.0040 | 2025-05-07 | Yes |
PFAS detections below EPA limits.
Nearby PFAS Investigation Sites
DoD records are nearby site investigations, not Los Alamitos drinking-water detections. Record names come from the source database and can be broad.
Jftb Los Alamitos
Army · National Guard
Suspected PFAS record
Remedial investigation underway
Estimated investigation end date: 2036-03
EPA ATTAINS records identify assessed water bodies that do not meet water-quality standards for designated uses.
Coyote Creek-San Gabriel River
Reported: Nov 2026
Health-relevant causes: Mercury, Metals (other Than Mercury), Pathogens, Pesticides, Polychlorinated Biphenyls (pcbs)
Affected uses: Ecological, Fishconsumption, Other, Recreation
Data from EPA ATTAINS
NPDES permits regulate pollutant discharges into U.S. waterways. Facilities must report compliance quarterly.
Violation records
Last inspected: Dec 2025
Last inspected: Dec 2025
Data from EPA ECHO
To investigate water contamination, check the sampling locations, dates and results below. For tap water records, see Drinking water quality above.
Reviewed: source records as of 2026
Review historical EPA air pollution records, including monitoring and facility emissions where available. For current conditions, check local air quality on AirNow.
Orange County
Assessment year: 2020
According to EPA, a cancer risk of 30-in-1-million means that for every 1 million people continuously exposed to these air toxics over a 70-year lifetime, an estimated 30 may develop cancer from that exposure. This is in addition to cancer risk from all other causes.
Top modeled source groups
Data from EPA AirToxScreen
EPA designations apply to a specific pollutant and federal air quality standard (NAAQS). EPA can issue a clean-data determination while a formal designation remains in effect.
Los Angeles-South Coast Air Basin: Ozone
NonattainmentExtreme8-Hour Ozone (2015 Standard)
Original designation: Aug 2018
Health effects (EPA): Respiratory inflammation, aggravation of asthma, reduced lung function (EPA)
Los Angeles-South Coast Air Basin: PM2.5
NonattainmentSeriousPM-2.5 (2012 Standard)
Original designation: Apr 2015
Health effects (EPA): Cardiovascular disease, respiratory illness, premature death (EPA)
Maintenance areas
Previously nonattainment; currently meeting the standard and monitored under an EPA maintenance plan.
Los Angeles-South Coast Air Basin Area
CO · Carbon Monoxide (1971 Standard)
Classification: Serious
Original designation: Nov 1990
Current design value: 6.7 ppm (2023-2025)
Data from EPA Green Book
EPA annual monitor summaries describe past measurements. For current air quality, see AirNow.
Anaheim
Annual mean: 0.3 Parts per million
Observation year: 2025
Annual mean: 19.0 Parts per billion
Observation year: 2025
Annual mean: 0.038 Parts per million
Observation year: 2025
Data from EPA AQS
Facilities regulated under the Clean Air Act. CAA HPV flags indicate serious noncompliance such as exceeding emission limits.
Air Violations
Last inspected: Dec 2025
Data from EPA ECHO
TRI releases are self-reported annual totals (calendar year 2024). Hover fugitive or stack for definitions.
Arrowhead Products Corp
Reported: 2024
Reviewed: source query run Nov 2026
Brownfield sites are properties where redevelopment is complicated by the presence of hazardous substances.
Open data source: Search EPA ECHONo matching brownfield records with active cleanup or investigation status surfaced for this city report.
Reviewed: active/open records as of Q1 2026
State environmental agencies maintain cleanup site databases that include state Superfund, voluntary cleanup, and brownfield remediation programs. These programs track additional sites beyond those on the federal NPL.
3 sites with active cleanup or investigation
4411 Katella Avenue, Los Alamitos
0.6 miles away · ORANGE County
Reported: Nov 2026
3876 FLORISTA ST, LOS ALAMITOS
0.5 miles away · ORANGE County
Reported: Nov 2026
4411 KATELLA AVENUE, LOS ALAMITOS
0.6 miles away · ORANGE County
Reported: Nov 2026
Data from EPA ECHO
Facilities with hazardous-waste handler records under RCRA in the reviewed 5-mile city-center search area. Active handler status is separate from air, water, or other ECHO compliance violations, which are shown in their own sections.
Active RCRA handler records in the reviewed city search area
No release reports shown in this group.
Reviewed: active/open records as of 2018
Data from EPA UST Finder
Reviewed: reporting year 2024
Formerly Used Defense Sites are properties previously owned by, leased to, or otherwise possessed by the United States and under the jurisdiction of the Secretary of Defense. The FUDS program addresses environmental restoration at these properties.
Open data source: USACE FUDSNo MSHA mine or extraction site records shown for this report.
Orange County, CA
EPA Radon Zone Map (June 2024 release)
Orange County is EPA Radon Zone 3 (low potential). EPA defines Zone 3 counties as having predicted average indoor screening levels below 2 pCi/L.
Radon levels can vary from home to home, so EPA recommends testing the property to know its indoor level.
FEMA flood zones describe mapped flood hazards. Look up a specific address with FEMA.
Minimal flood hazard — outside the 1% and 0.2% annual chance floodplains.
Results use an earlier stored RMP inventory. Current EPA ECHO location coverage is unverified.
EPA ECHO lists facilities linked to the Risk Management Program. Results include facilities with locations that can be matched. Records may be historical. Current operations, chemical inventories, and recent accident history are unverified.
PHMSA tracks incidents involving natural gas and hazardous liquid pipelines. Incidents include leaks, ruptures, and explosions.
Recent Incidents (last 5 years)
ZENITH ENERGY WEST COAST TERMINALS LLC
Incident date: Sep 21, 2023
Property damage: $10,716
Data from PHMSA
Health outcomes from County Health Rankings. Values shown alongside state and national averages.
Orange County, CaliforniaPop. 3,151,184
County Health Rankings edition: 2024
Premature Death
Poor or Fair Health
Poor Physical Health Days
Poor Mental Health Days
Adult Smoking
Adult Obesity
Air Pollution - Particulate Matter
Drinking water violation indicator
Diabetes Prevalence
Life Expectancy
| Indicator | County | State | National |
|---|---|---|---|
| Premature Death | 4,990 | 6,373 | 7,972 |
| Poor or Fair Health | 14.4% | 15.8% | 14.2% |
| Poor Physical Health Days | 3.1 | 3.1 | 3.3 |
| Poor Mental Health Days | 4.5 | 4.7 | 4.8 |
| Adult Smoking | 9.7% | 8.8% | 15.0% |
| Adult Obesity | 25.3% | 27.8% | 34.0% |
| Air Pollution - Particulate Matter | 9.4 | 7.1 | 7.3 |
| Drinking water violation indicator | No | N/A | N/A |
| Diabetes Prevalence | 9.5% | 10.8% | 9.6% |
| Life Expectancy | 81.8 | 79.9 | 77.6 |
EPA testing found PFAS in water samples from Downey-City, Water Department. Results dated Jan 14, 2025 to Jul 1, 2025 include PFOS at 0.012 to 0.044 micrograms per liter and PFPeA at 0.0062 to 0.027 micrograms per liter.
EPA testing found PFAS in water samples from Lakewood-City, Water Department. Results dated Nov 25, 2025 include PFOS at 0.0078 to 0.0167 micrograms per liter and PFHxS at 0.0031 micrograms per liter.
EPA testing found PFAS in water samples from the City of Anaheim. Results dated Nov 5, 2024 to May 14, 2025 include PFOS at 0.0055 to 0.029 micrograms per liter and PFBA at 0.005 to 0.0165 micrograms per liter.
Check with the utility that serves your address for its testing results.
EPA drinking water records on this page list 2 violations for Downey-City, Water Department.
The EPA drinking water records available here list no violations for Lakewood-City, Water Department.
EPA drinking water records on this page list 3 violations for the City of Anaheim.
Check your water bill to identify the utility serving your address. Ask that utility about current drinking water advisories.
Nearby EPA monitoring stations provide annual air quality measurements for Los Alamitos.
The monitoring station at Anaheim recorded an annual average of 0.3 Parts per million for carbon monoxide in 2025.
The monitoring station at Anaheim recorded an annual average of 19 Parts per billion for nitrogen dioxide in 2025.
The monitoring station at Anaheim recorded an annual average of 0.038 Parts per million for ozone in 2025.
Download 2025 EPA annual monitor dataCurrent air quality on AirNow
The radon data for Los Alamitos covers Orange County. EPA places this area in Zone 3, with a predicted average indoor radon screening level below 2 picocuries per liter.
No Superfund sites were returned for this city report.
This city report shows 1 brownfield site: Los Alamitos Unified School District.
The county data for Los Alamitos reports a life expectancy of 81.8 years in Orange County, California.
The figure is from the 2024 edition of County Health Rankings, a University of Wisconsin program that publishes county health statistics.
The county data for Los Alamitos reports 4,990 years of life lost to deaths before age 75 per 100,000 residents in Orange County, California. This measure adds up the years lost to early deaths and adjusts for differences in population age.
The figure is from the 2024 edition of County Health Rankings, a University of Wisconsin program that publishes county health statistics.
The county data for Los Alamitos lists fine-particle pollution (PM2.5) at 9.4 micrograms per cubic meter in Orange County, California.
The figure is from the 2024 edition of County Health Rankings, a University of Wisconsin program that publishes county health statistics.
Federal pipeline records list an incident involving Plains Pipeline, L.P. near Los Alamitos on Jul 28, 2016. The reported release was a liquid petroleum product.
Federal pipeline records list an incident involving Southern California Gas Co near Los Alamitos on Feb 23, 2011. The reported release was natural gas.
Federal pipeline records list an incident involving Zenith Energy West Coast Terminals LLC near Los Alamitos on Sep 21, 2023. The reported release was crude oil.