Illinois · drinking water · SDWIS through latest publish

Ej Water Cooperative Water Quality — Dieterich, Illinois

PWSID IL0790010 · Surface waterPrivate

29,720 people served. No health-based SDWIS violations recorded in the past 5 years. 25 remain unresolved. Last cited 1 year ago.

ALL SDWIS VIOLATIONS · 20222026 (annual count)
Bar chart of annual values from 2022 to 2026, in violations. Most recent year (2026): 0 violations.60 violations'22'23'24'25'260 violations
Anomaly engine

Active signals

UNRESOLVED VIOLATION · SDWIS VIOLATION

Contaminant 7000

Unresolved Phase I/II/V Synthetic Organic Chemical Rules violation cited in 2025 (contaminant 7000).

EPA SDWIS record

UNRESOLVED VIOLATION · SDWIS VIOLATION

Contaminant 0100

Unresolved Long Term 2 Enhanced SWTR violation cited in 2025 (contaminant 0100).

EPA SDWIS record

UNRESOLVED VIOLATION · SDWIS VIOLATION

Contaminant 3015

Unresolved Long Term 2 Enhanced SWTR violation cited in 2025 (contaminant 3015).

EPA SDWIS record

UNRESOLVED VIOLATION · SDWIS VIOLATION

E. coli

Unresolved Long Term 2 Enhanced SWTR violation cited in 2025 (e. coli).

EPA SDWIS record

Most-cited contaminants

What This Utility Gets Cited For

  • Contaminant 010022 citations
  • E. coli22 citations
  • Contaminant 301521 citations
  • Contaminant 10097 citations
  • Total Trihalomethanes (TTHM)3 citations
  • Contaminant 70001 citation
Violation history

What's On The SDWIS Record

Health-based violations exceed an MCL or treatment-technique standard. Monitoring violations are reporting failures with no measured exceedance — they tell you the system isn't fully transparent, not that the water is unsafe today.

OTHER · CONTAMINANT 7000UNRESOLVED

2025 · Contaminant 7000 · Phase I/II/V Synthetic Organic Chemical Rules

OTHER

CONTAMINANT CODE 7000

MONITORING · CONTAMINANT 3015

2025 · Contaminant 3015 · Long Term 2 Enhanced SWTR

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 3015

MONITORING · CONTAMINANT 3015

2025 · Contaminant 3015 · Long Term 2 Enhanced SWTR

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 3015

MONITORING · CONTAMINANT 0100UNRESOLVED

2025 · Contaminant 0100 · Long Term 2 Enhanced SWTR

Failure to monitor as scheduled

CONTAMINANT CODE 0100

MONITORING · CONTAMINANT 0100

2025 · Contaminant 0100 · Long Term 2 Enhanced SWTR

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 0100

MONITORING · CONTAMINANT 0100

2025 · Contaminant 0100 · Long Term 2 Enhanced SWTR

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 0100

MONITORING · CONTAMINANT 3015UNRESOLVED

2025 · Contaminant 3015 · Long Term 2 Enhanced SWTR

Failure to monitor as scheduled

CONTAMINANT CODE 3015

MONITORING · CONTAMINANT 3015

2025 · Contaminant 3015 · Long Term 2 Enhanced SWTR

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 3015

MONITORING · CONTAMINANT 3015

2025 · Contaminant 3015 · Long Term 2 Enhanced SWTR

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 3015

MONITORING · E. COLIUNRESOLVED

2025 · E. coli · Long Term 2 Enhanced SWTR

Failure to monitor as scheduled

CONTAMINANT CODE 3014

MONITORING · E. COLI

2025 · E. coli · Long Term 2 Enhanced SWTR

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 3014

MONITORING · E. COLI

2025 · E. coli · Long Term 2 Enhanced SWTR

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 3014

MONITORING · TOTAL TRIHALOMETHANES (TTHM)

2024 · Total Trihalomethanes (TTHM) · Total Trihalomethanes Rule

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 2950

MONITORING · TOTAL TRIHALOMETHANES (TTHM)UNRESOLVED

2024 · Total Trihalomethanes (TTHM) · Total Trihalomethanes Rule

Failure to monitor as scheduled

CONTAMINANT CODE 2950

MONITORING · TOTAL TRIHALOMETHANES (TTHM)

2024 · Total Trihalomethanes (TTHM) · Total Trihalomethanes Rule

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 2950

MONITORING · CONTAMINANT 0100

2024 · Contaminant 0100 · Long Term 2 Enhanced SWTR

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 0100

MONITORING · CONTAMINANT 0100UNRESOLVED

2024 · Contaminant 0100 · Long Term 2 Enhanced SWTR

Failure to monitor as scheduled

CONTAMINANT CODE 0100

MONITORING · CONTAMINANT 0100UNRESOLVED

2024 · Contaminant 0100 · Long Term 2 Enhanced SWTR

Failure to monitor as scheduled

CONTAMINANT CODE 0100

MONITORING · CONTAMINANT 0100

2024 · Contaminant 0100 · Long Term 2 Enhanced SWTR

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 0100

MONITORING · CONTAMINANT 3015

2024 · Contaminant 3015 · Long Term 2 Enhanced SWTR

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 3015

MONITORING · CONTAMINANT 3015UNRESOLVED

2024 · Contaminant 3015 · Long Term 2 Enhanced SWTR

Failure to monitor as scheduled

CONTAMINANT CODE 3015

MONITORING · CONTAMINANT 3015UNRESOLVED

2024 · Contaminant 3015 · Long Term 2 Enhanced SWTR

Failure to monitor as scheduled

CONTAMINANT CODE 3015

MONITORING · CONTAMINANT 3015

2024 · Contaminant 3015 · Long Term 2 Enhanced SWTR

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 3015

MONITORING · E. COLI

2024 · E. coli · Long Term 2 Enhanced SWTR

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 3014

MONITORING · E. COLIUNRESOLVED

2024 · E. coli · Long Term 2 Enhanced SWTR

Failure to monitor as scheduled

CONTAMINANT CODE 3014

MONITORING · E. COLIUNRESOLVED

2024 · E. coli · Long Term 2 Enhanced SWTR

Failure to monitor as scheduled

CONTAMINANT CODE 3014

MONITORING · E. COLI

2024 · E. coli · Long Term 2 Enhanced SWTR

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 3014

MONITORING · CONTAMINANT 0100

2024 · Contaminant 0100 · Long Term 2 Enhanced SWTR

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 0100

MONITORING · CONTAMINANT 0100UNRESOLVED

2024 · Contaminant 0100 · Long Term 2 Enhanced SWTR

Failure to monitor as scheduled

CONTAMINANT CODE 0100

MONITORING · CONTAMINANT 0100UNRESOLVED

2024 · Contaminant 0100 · Long Term 2 Enhanced SWTR

Failure to monitor as scheduled

CONTAMINANT CODE 0100

MONITORING · CONTAMINANT 0100

2024 · Contaminant 0100 · Long Term 2 Enhanced SWTR

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 0100

MONITORING · CONTAMINANT 3015

2024 · Contaminant 3015 · Long Term 2 Enhanced SWTR

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 3015

MONITORING · CONTAMINANT 3015UNRESOLVED

2024 · Contaminant 3015 · Long Term 2 Enhanced SWTR

Failure to monitor as scheduled

CONTAMINANT CODE 3015

MONITORING · CONTAMINANT 3015UNRESOLVED

2024 · Contaminant 3015 · Long Term 2 Enhanced SWTR

Failure to monitor as scheduled

CONTAMINANT CODE 3015

MONITORING · CONTAMINANT 3015

2024 · Contaminant 3015 · Long Term 2 Enhanced SWTR

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 3015

MONITORING · E. COLI

2024 · E. coli · Long Term 2 Enhanced SWTR

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 3014

MONITORING · E. COLIUNRESOLVED

2024 · E. coli · Long Term 2 Enhanced SWTR

Failure to monitor as scheduled

CONTAMINANT CODE 3014

MONITORING · E. COLIUNRESOLVED

2024 · E. coli · Long Term 2 Enhanced SWTR

Failure to monitor as scheduled

CONTAMINANT CODE 3014

MONITORING · E. COLI

2024 · E. coli · Long Term 2 Enhanced SWTR

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 3014

MONITORING · CONTAMINANT 0100

2024 · Contaminant 0100 · Long Term 2 Enhanced SWTR

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 0100

MONITORING · CONTAMINANT 0100UNRESOLVED

2024 · Contaminant 0100 · Long Term 2 Enhanced SWTR

Failure to monitor as scheduled

CONTAMINANT CODE 0100

MONITORING · CONTAMINANT 0100

2024 · Contaminant 0100 · Long Term 2 Enhanced SWTR

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 0100

MONITORING · CONTAMINANT 0100

2024 · Contaminant 0100 · Long Term 2 Enhanced SWTR

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 0100

MONITORING · CONTAMINANT 3015

2024 · Contaminant 3015 · Long Term 2 Enhanced SWTR

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 3015

MONITORING · CONTAMINANT 3015UNRESOLVED

2024 · Contaminant 3015 · Long Term 2 Enhanced SWTR

Failure to monitor as scheduled

CONTAMINANT CODE 3015

MONITORING · CONTAMINANT 3015

2024 · Contaminant 3015 · Long Term 2 Enhanced SWTR

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 3015

MONITORING · CONTAMINANT 3015

2024 · Contaminant 3015 · Long Term 2 Enhanced SWTR

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 3015

MONITORING · E. COLI

2024 · E. coli · Long Term 2 Enhanced SWTR

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 3014

MONITORING · E. COLIUNRESOLVED

2024 · E. coli · Long Term 2 Enhanced SWTR

Failure to monitor as scheduled

CONTAMINANT CODE 3014

MONITORING · E. COLI

2024 · E. coli · Long Term 2 Enhanced SWTR

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 3014

MONITORING · E. COLI

2024 · E. coli · Long Term 2 Enhanced SWTR

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 3014

MONITORING · CONTAMINANT 1009

2024 · Contaminant 1009 · Disinfectants and Disinfection Byproducts (Stage 2)

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 1009

MONITORING · CONTAMINANT 1009

2024 · Contaminant 1009 · Disinfectants and Disinfection Byproducts (Stage 2)

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 1009

MONITORING · CONTAMINANT 1009

2024 · Contaminant 1009 · Disinfectants and Disinfection Byproducts (Stage 2)

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 1009

MONITORING · CONTAMINANT 0100

2024 · Contaminant 0100 · Long Term 2 Enhanced SWTR

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 0100

MONITORING · CONTAMINANT 0100UNRESOLVED

2024 · Contaminant 0100 · Long Term 2 Enhanced SWTR

Failure to monitor as scheduled

CONTAMINANT CODE 0100

MONITORING · CONTAMINANT 0100

2024 · Contaminant 0100 · Long Term 2 Enhanced SWTR

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 0100

MONITORING · CONTAMINANT 0100

2024 · Contaminant 0100 · Long Term 2 Enhanced SWTR

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 0100

MONITORING · CONTAMINANT 3015

2024 · Contaminant 3015 · Long Term 2 Enhanced SWTR

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 3015

MONITORING · CONTAMINANT 3015UNRESOLVED

2024 · Contaminant 3015 · Long Term 2 Enhanced SWTR

Failure to monitor as scheduled

CONTAMINANT CODE 3015

MONITORING · CONTAMINANT 3015

2024 · Contaminant 3015 · Long Term 2 Enhanced SWTR

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 3015

MONITORING · CONTAMINANT 3015

2024 · Contaminant 3015 · Long Term 2 Enhanced SWTR

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 3015

MONITORING · E. COLI

2024 · E. coli · Long Term 2 Enhanced SWTR

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 3014

MONITORING · E. COLIUNRESOLVED

2024 · E. coli · Long Term 2 Enhanced SWTR

Failure to monitor as scheduled

CONTAMINANT CODE 3014

MONITORING · E. COLI

2024 · E. coli · Long Term 2 Enhanced SWTR

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 3014

MONITORING · E. COLI

2024 · E. coli · Long Term 2 Enhanced SWTR

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 3014

MONITORING · CONTAMINANT 0100

2024 · Contaminant 0100 · Long Term 2 Enhanced SWTR

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 0100

MONITORING · CONTAMINANT 0100UNRESOLVED

2024 · Contaminant 0100 · Long Term 2 Enhanced SWTR

Failure to monitor as scheduled

CONTAMINANT CODE 0100

MONITORING · CONTAMINANT 0100

2024 · Contaminant 0100 · Long Term 2 Enhanced SWTR

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 0100

MONITORING · E. COLI

2024 · E. coli · Long Term 2 Enhanced SWTR

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 3014

MONITORING · E. COLIUNRESOLVED

2024 · E. coli · Long Term 2 Enhanced SWTR

Failure to monitor as scheduled

CONTAMINANT CODE 3014

MONITORING · E. COLI

2024 · E. coli · Long Term 2 Enhanced SWTR

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 3014

MONITORING · CONTAMINANT 1009

2022 · Contaminant 1009 · Disinfectants and Disinfection Byproducts (Stage 2)

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 1009

MONITORING · CONTAMINANT 1009

2022 · Contaminant 1009 · Disinfectants and Disinfection Byproducts (Stage 2)

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 1009

MONITORING · CONTAMINANT 1009

2022 · Contaminant 1009 · Disinfectants and Disinfection Byproducts (Stage 2)

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 1009

MONITORING · CONTAMINANT 1009

2022 · Contaminant 1009 · Disinfectants and Disinfection Byproducts (Stage 2)

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 1009

Equity context · ACS 2018-2022 · USEPA-clone EJ disparity

Who Drinks This Water

Jasper County, Illinois (utility's served county per SDWIS GEOGRAPHIC_AREA — city-level not yet matched): a service population of 9,295. Local disparity score for pm2.5 (fine particulate) sits well below the reference (41). Why we surface this →

POPULATION SHARE
9.2%

Low-income

POPULATION SHARE
3.6%

People of color

POPULATION SHARE
5.8%

Under age 5

POPULATION SHARE
20.0%

Over age 64

NATIONAL PERCENTILE · vs all US block groups (population-weighted; ranked against the national EJScreen indicator distribution)

  • PM2.5 (fine particulate)Health riskFine inhalable particles 2.5 micrometers or smaller. They travel deep into the lungs and into the bloodstream — linked to asthma, heart disease, stroke, and premature death.60near the national median
  • OzoneHealth riskGround-level ozone (smog) inflames the airways. Even short exposures trigger asthma attacks and worsen chronic lung and heart disease.50near the national median
  • Nitrogen dioxide (NO₂)Health riskA tailpipe and combustion gas. Concentrates near busy roads and industrial sites; raises risk of airway inflammation, asthma, and lower respiratory infections in children.21below the national median
  • Diesel particulateHealth riskSoot from diesel engines (trucks, trains, ports, construction). EPA classifies it as a likely human carcinogen and a major driver of childhood asthma near freight corridors.23below the national median
  • Toxic releases (RSEI)Health riskEPA's Risk-Screening Environmental Indicators score — weights TRI chemical releases by toxicity, where they go, and how many people are nearby. Higher means greater modeled cancer and chronic-health risk.28below the national median
  • Traffic proximityHealth riskPopulation-weighted distance to high-volume roads. Living close to heavy traffic raises exposure to PM2.5, NO₂, and diesel exhaust — and the cardiovascular and asthma risks that follow.1below the national median
  • Lead-paint risk (pre-1960 housing)Health riskShare of housing built before 1960, when lead-based paint was common. Dust from deteriorating paint is the leading cause of childhood lead poisoning, which permanently impairs cognitive development.73above the national median
  • Superfund site proximityHealth riskPopulation-weighted distance to NPL Superfund sites — the most contaminated waste sites in the country. Nearby groundwater, soil, and air can carry industrial solvents, metals, and other long-lived contaminants.56near the national median
  • RMP-facility proximityHealth riskDistance to facilities holding chemicals at quantities large enough to require an EPA Risk Management Plan (refineries, fertilizer plants, etc.). These pose acute exposure risk during accidental releases.47near the national median
  • Hazardous-waste site proximityHealth riskDistance to RCRA hazardous-waste handlers (treatment, storage, disposal facilities). Indicates potential exposure to industrial chemicals in air, soil, and groundwater.14below the national median
  • Underground storage tanksHealth riskDensity of underground tanks (gasoline, heating oil, industrial fluids). Leaking tanks are a leading source of benzene and other volatile organic compounds in groundwater drinking-water supplies.53near the national median
  • NPDES wastewater proximityHealth riskDistance to permitted industrial wastewater dischargers. Closer proximity raises exposure to pollutants released into surface waters used for fishing, recreation, and downstream drinking-water intakes.54near the national median
  • Drinking-water non-complianceHealth riskEPA score for public water systems with health-based Safe Drinking Water Act violations. Higher means more residents on systems that recently exceeded safe limits for contaminants like lead, arsenic, or nitrate.76above the national median
EJ disparity scores · service-area block groups (100 = national reference; higher = greater disparate burden)
IndicatorDisparity scoreReading
PM2.5 (fine particulate)41well below the reference
Ozone41well below the reference
Nitrogen dioxide (NO₂)19well below the reference
Diesel particulate18well below the reference
Toxic releases (RSEI)18well below the reference
Traffic proximity0well below the reference
Lead-paint risk (pre-1960 housing)45well below the reference
Superfund site proximity0well below the reference
RMP-facility proximity19well below the reference
Hazardous-waste site proximity0well below the reference
Underground storage tanks24well below the reference
NPDES wastewater proximity30well below the reference
Drinking-water non-compliance0well below the reference

Source: Census ACS 2018-2022 (5-year) + USEPA-clone EJ blockgroup stats (raw indicators + EJ disparity mirror).

Source. EPA Safe Drinking Water Information System · retrieved 2026-05-07. Reporting period 2022-01-012026-05-07.

What this is not. SDWIS records compliance against federal MCLs — not a direct readout of tap-water concentrations. Active health-based violations are not the same as a current crisis; we link to the EPA record so you can verify return-to-compliance status before forming a conclusion.