Modesto Environmental Toxin Report

Public environmental health records for water, air, land, infrastructure, incidents, and community indicators.

Toxin Scout is in beta. Double check all data

Toxin Scout summarizes public records from government and public datasets. Data can be delayed, incomplete, approximate, matched at non-parcel levels, or have accuracy problems as a result of this product's beta status, so verify important findings against the linked source records.

Water quality in Modesto

Drinking water compliance, PFAS records, natural water body health, discharge permits, and water-quality monitoring records for Modesto.

Drinking Water

Drinking Water Compliance

Public water-system records for Modesto, CA from EPA SDWIS.

Modesto, City of

PFAS above an official threshold detected in available EPA records.

Reviewed: active/open records as of Q1 2026

Purchased or imported water record · Serves 218,771 people

Data from EPA SDWIS

PFAS Screening

PFAS screening separates EPA UCMR5 drinking-water monitoring from nearby DoD PFAS investigation-site records; EPA samples shown are from Nov 2023 to Sep 2024.

Drinking Water PFAS Monitoring

EPA UCMR5 samples public water systems. These results are separate from nearby PFAS cleanup or investigation-site records.

22 PFAS sample results above EPA limits

Sample period: Nov 2023 to Sep 2024

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	0.0260	0.0040	2024-08-28	Yes
PFOS	0.0120	0.0040	2024-08-28	Yes
PFOS	0.0110	0.0040	2023-11-16	Yes
PFOS	0.0099	0.0040	2024-05-16	Yes
PFOS	0.0097	0.0040	2023-11-16	Yes
PFOS	0.0091	0.0040	2024-05-16	Yes
PFOA	0.0086	0.0040	2024-08-28	Yes
PFOA	0.0074	0.0040	2024-08-28	Yes
PFOS	0.0068	0.0040	2024-05-16	Yes
PFOS	0.0064	0.0040	2024-05-16	Yes
PFOS	0.0063	0.0040	2024-08-28	Yes
PFOA	0.0062	0.0040	2024-05-16	Yes
PFOA	0.0055	0.0040	2024-08-28	Yes
PFOS	0.0053	0.0040	2023-11-16	Yes
PFOS	0.0046	0.0040	2023-11-16	Yes
PFOS	0.0046	0.0040	2024-09-12	Yes
PFOS	0.0045	0.0040	2023-11-16	Yes
PFOS	0.0045	0.0040	2024-01-04	Yes
PFOA	0.0044	0.0040	2024-05-16	Yes
PFOA	0.0044	0.0040	2024-05-16	Yes
PFOA	0.0043	0.0040	2023-11-16	Yes
PFOA	0.0041	0.0040	2024-09-12	Yes

PFAS detections below EPA limits.

Chemical	Concentration (µg/L)	EPA Limit (µg/L)	Sample date	Over Limit
PFHxS	0.0093	0.0100	2024-08-28	No
PFHxS	0.0069	0.0100	2024-09-12	No
PFPeA	0.0067	None set	2024-08-28	No
PFHxA	0.0061	None set	2024-08-28	No
PFHxS	0.0052	0.0100	2024-05-16	No
PFHxS	0.0047	0.0100	2023-11-16	No
PFPeA	0.0046	None set	2024-09-12	No
PFPeA	0.0045	None set	2024-05-15	No
PFPeA	0.0045	None set	2024-08-28	No
PFHxS	0.0044	0.0100	2024-08-28	No
PFHxA	0.0043	None set	2024-08-28	No
PFHxS	0.0043	0.0100	2024-05-15	No
PFBS	0.0043	2.0000	2024-05-16	No
PFHxS	0.0042	0.0100	2023-11-16	No
PFHxS	0.0040	0.0100	2024-05-16	No
PFOS	0.0040	0.0040	2024-05-16	No
PFHxA	0.0039	None set	2024-09-12	No
PFHxA	0.0039	None set	2024-05-15	No
PFHxS	0.0039	0.0100	2024-05-16	No
PFPeA	0.0038	None set	2024-05-16	No
PFPeA	0.0038	None set	2023-11-16	No
PFHxS	0.0036	0.0100	2024-01-04	No
PFHpA	0.0036	None set	2024-08-28	No
PFPeA	0.0036	None set	2023-11-16	No
PFBS	0.0034	2.0000	2024-09-12	No
PFHxA	0.0034	None set	2024-05-16	No
PFHxA	0.0034	None set	2023-11-16	No
PFHxS	0.0034	0.0100	2023-11-16	No
PFHxS	0.0033	0.0100	2023-11-16	No
PFPeA	0.0032	None set	2024-05-16	No
PFHxA	0.0032	None set	2024-05-16	No
PFHxS	0.0031	0.0100	2024-05-16	No
PFHxA	0.0030	None set	2024-08-28	No

Nearby PFAS Investigation Sites

DoD records are nearby site investigations, not Modesto drinking-water detections. Record names come from the source database and can be broad.

No DoD PFAS investigation site records surfaced within the search radius.

Natural Water

Impaired Water Bodies

No health-relevant impaired water body records surfaced within 10 km in EPA ATTAINS.

Data from EPA ATTAINS

Discharge

Discharge Permits (NPDES)

NPDES permits regulate pollutant discharges into U.S. waterways. Facilities must report compliance quarterly.

Violation records

Americold

Last inspected: Dec 2025

Status: Violation Identified · 12 of 12 quarters with noncompliance

Bmc Modesto Nathan Bfs

Last inspected: Dec 2025

Status: Violation Identified · 4 of 12 quarters with noncompliance

Data from EPA ECHO

USGS Water Quality MonitoringNo issue records surfaced in the USGS Water Quality Portal (3 monitoring stations reviewed).

Reviewed: source records as of Jan 5005

Air quality and emissions in Modesto

Air quality data from EPA monitoring stations, facility emissions inventories, and area-level air-quality designations in this city.

Air Quality Assessment

EPA AirToxScreen — Estimated Cancer Risk

40estimated additional cancer cases per million people

Stanislaus County

Reported: Dec 2020

EPA national average is ~30 per million

According to EPA, a cancer risk of 40-in-1-million means that for every 1 million people continuously exposed to these air toxics over a 70-year lifetime, an estimated 40 may develop cancer from that exposure. This is in addition to cancer risk from all other causes.

Top local emission sources

Residential wood burningWildfires & prescribed burns

Data from EPA AirToxScreen

Nonattainment Status

EPA designates an area as nonattainment when air quality does not meet federal health-based standards (NAAQS) for a specific pollutant.

San Joaquin Valley: Ozone

NonattainmentExtreme

8-Hour Ozone (2015 Standard)

Original designation: Aug 2018

Design value: 0.093 ppm(2020-2022)

NAAQS: 0.070 ppm (8-hr avg)

Health effects (EPA): Respiratory inflammation, aggravation of asthma, reduced lung function (EPA)

San Joaquin Valley: PM2.5

NonattainmentSerious

PM-2.5 (2012 Standard)

Original designation: Apr 2015

Design value: 17.8 µg/m³(2020-2022)

NAAQS: 9.0 µg/m³ (annual) / 35 µg/m³ (24-hr)

Health effects (EPA): Cardiovascular disease, respiratory illness, premature death (EPA)

San Joaquin Valley 1997 PM2.5 24-Hour: PM2.5

NonattainmentSerious

PM-2.5 (1997 Standard)

Original designation: Apr 2005

Design value: 17.8 µg/m³(2019-2021)

NAAQS: 9.0 µg/m³ (annual) / 35 µg/m³ (24-hr)

Health effects (EPA): Cardiovascular disease, respiratory illness, premature death (EPA)

Data from EPA Green Book

Air Quality Monitoring (AQS)

Manteca

PM10Indicative AQI from annual mean: 23 - Good

Annual mean: 25.2 μg/m³ · EPA standard: 150 μg/m³

Reported: Mar 2026

PM2.5Indicative AQI from annual mean: 45 - Good

Annual mean: 8.2 μg/m³ · EPA standard: 9 μg/m³

Reported: Mar 2026

Modesto-14Th Street

COIndicative AQI from annual mean: 3 - Good

Annual mean: 0.3 ppm · EPA standard: 9 ppm

Reported: Mar 2026

Data from EPA AQS

Facilities & Emissions

Air Quality Violations or Noncompliance

Facilities regulated under the Clean Air Act. CAA HPV flags indicate serious noncompliance such as exceeding emission limits.

No facility records with active violation or noncompliance flags surfaced in EPA ECHO.

Reviewed: active/open records as of Q4 2025

Data from EPA ECHO

Permitted Air Emissions (TRI)

TRI releases are self-reported annual totals (calendar year 2024). Hover fugitive or stack for definitions.

7/11 Materials Inc

Reported: 2024

Lead

0.06 lbs

Mercury

0.01 lbs

Total air: 0.07 lbsFugitive: 0.001 lbsStack: 0.07 lbs

Blue Diamond Growers

Reported: 2024

Sulfuryl fluoride

45,555.00 lbs

Total air: 45,555.00 lbsFugitive: 5.00 lbsStack: 45,550.00 lbs

Crystal Creamery Inc.

Reported: 2024

Peracetic acid

129.00 lbs

Total air: 129.00 lbsFugitive: 129.00 lbs

Land contamination and cleanup records in Modesto

Contaminated sites, waste facilities, cleanup records, and industrial operations in this city.

Contaminated Sites

Superfund Sites

Sites listed on the National Priorities List (NPL) where releases or threatened releases of hazardous substances may endanger public health or the environment, as designated under CERCLA.

Modesto Ground Water Contamination

· 110009268425

Reported: Nov 2021

NPL Status: Currently on Final NPL

Cleanup: Active Cleanup

Contaminants: TETRACHLOROETHENE, TOLUENE, TRICHLOROETHENE

Brownfield Sites (EPA ACRES)No matching brownfield site records surfaced for this city report in the EPA ACRES database.

Reviewed: source query run Jun 2026

Waste Facilities

Hazardous Waste — RCRA Handlers

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

Aerc Acquisition Corporation Dba Aerc Recycling Solutions, A Clean Earth Company

Status: Active hazardous-waste handler record

Active handler·Last RCRA inspection: Jul 25, 2019

Custom Marble and Onyx

Status: Active hazardous-waste handler record

Active handler·Last RCRA inspection: Mar 10, 2025

E & J Gallo Winery & Brandy

Status: Active hazardous-waste handler record

Active handler·Last RCRA inspection: Jun 5, 2025

Underground Storage Tanks

No underground storage tank records with active/open release status surfaced within 2 miles.

Data from EPA UST Finder

On-Site Waste Disposal (TRI)No TRI-reported on-site land disposal records surfaced for this city report.

Reviewed: reporting year 2024

Military & Industrial

Data as of Jun 2026

Formerly Used Defense Sites

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.

Hammond General Hospital

Reported: Jun 2026

Status: Properties with all projects at site closeout

J09CA0824

MSHA Mine and Extraction SitesNo MSHA-regulated mine or extraction site records surfaced within 5 miles.

Hydraulic Fracturing WellsNo hydraulic fracturing well disclosure records surfaced for this city report.

Radon Context

Data as of Mar 2026

County radon potential

EPA Zone 3Lower radon potential

Stanislaus County, CA

Reported: Mar 2026

Stanislaus 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.

Find radon testing in CAZone classification per EPA Map of Radon Zones.

Infrastructure, incidents, and community health in Modesto

Flood-map status, chemical accident risk, nuclear facilities, pipeline incidents, and community health indicators in this city.

FEMA Flood ZonesNot in a FEMA-mapped flood zone at this location.

Chemical & Industrial Risk

Chemical Accident Risk (RMP)

Risk Management Program facilities handle extremely hazardous substances (e.g., chlorine, ammonia, propane). EPA requires these facilities to plan for worst-case chemical releases.

No facility records with recent chemical accidents surfaced for this property within the last five years.

Data from EPA ECHO

Nuclear Facilities (NRC)No NRC-licensed nuclear facility records surfaced for this city report.

Pipeline Incidents

PHMSA tracks incidents involving natural gas and hazardous liquid pipelines. Incidents include leaks, ruptures, and explosions.

No pipeline incident records surfaced for this city report in the last 5 years.

Reviewed: last 5 years

Data from PHMSA

Community Health

Community Health Indicators

Health outcomes from County Health Rankings. Values shown alongside state and national averages.

Stanislaus County, CaliforniaPop. 551,275

Reported: Mar 2026

Premature Death

County: 8,878
State: 6,373
National: 7,972

Poor or Fair Health

County: 20.1%
State: 15.8%
National: 14.2%

Poor Physical Health Days

County: 4.2
State: 3.1
National: 3.3

Poor Mental Health Days

County: 5.5
State: 4.7
National: 4.8

Adult Smoking

County: 14.4%
State: 8.8%
National: 15.0%

Adult Obesity

County: 34.8%
State: 27.8%
National: 34.0%

Air Pollution - Particulate Matter

County: 10.6
State: 7.1
National: 7.3

Drinking Water Violations

County: 1
State: 1
National: N/A

Diabetes Prevalence

County: 11.6%
State: 10.8%
National: 9.6%

Life Expectancy

County: 76.0
State: 79.9
National: 77.6

Indicator	County	State	National
Premature Death	8,878	6,373	7,972
Poor or Fair Health	20.1%	15.8%	14.2%
Poor Physical Health Days	4.2	3.1	3.3
Poor Mental Health Days	5.5	4.7	4.8
Adult Smoking	14.4%	8.8%	15.0%
Adult Obesity	34.8%	27.8%	34.0%
Air Pollution - Particulate Matter	10.6	7.1	7.3
Drinking Water Violations	1	1	N/A
Diabetes Prevalence	11.6%	10.8%	9.6%
Life Expectancy	76.0	79.9	77.6

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Preparing Modesto environmental records...

Chemical

Concentration (µg/L)

EPA Limit (µg/L)

Sample date

Over Limit

PFOS

0.0260

0.0040

2024-08-28

Yes

PFOS

0.0120

0.0040

2024-08-28

Yes

PFOS

0.0110

0.0040

2023-11-16

Yes

PFOS

0.0099

0.0040

2024-05-16

Yes

PFOS

0.0097

0.0040

2023-11-16

Yes

PFOS

0.0091

0.0040

2024-05-16

Yes

PFOA

0.0086

0.0040

2024-08-28

Yes

PFOA

0.0074

0.0040

2024-08-28

Yes

PFOS

0.0068

0.0040

2024-05-16

Yes

PFOS

0.0064

0.0040

2024-05-16

Yes

PFOS

0.0063

0.0040

2024-08-28

Yes

PFOA

0.0062

0.0040

2024-05-16

Yes

PFOA

0.0055

0.0040

2024-08-28

Yes

PFOS

0.0053

0.0040

2023-11-16

Yes

PFOS

0.0046

0.0040

2023-11-16

Yes

PFOS

0.0046

0.0040

2024-09-12

Yes

PFOS

0.0045

0.0040

2023-11-16

Yes

PFOS

0.0045

0.0040

2024-01-04

Yes

PFOA

0.0044

0.0040

2024-05-16

Yes

PFOA

0.0044

0.0040

2024-05-16

Yes

PFOA

0.0043

0.0040

2023-11-16

Yes

PFOA

0.0041

0.0040

2024-09-12

Yes

Indicator

County

State

National

Premature Death

8,878

6,373

7,972

Poor or Fair Health

20.1%

15.8%

14.2%

Poor Physical Health Days

4.2

3.1

3.3

Poor Mental Health Days

5.5

4.7

4.8

Adult Smoking

14.4%

8.8%

15.0%

Adult Obesity

34.8%

27.8%

34.0%

Air Pollution - Particulate Matter

10.6

7.1

7.3

Drinking Water Violations

N/A

Diabetes Prevalence

11.6%

10.8%

9.6%

Life Expectancy

76.0

79.9

77.6