Missouri · drinking water · SDWIS through latest publish

Risco Pws Water Quality — Risco, Missouri

PWSID MO4010689 · GroundwaterMunicipal

278 people served. 3 health-based SDWIS violations recorded in the past 5 years. 14 remain unresolved. Last cited 1 year ago.

ALL SDWIS VIOLATIONS · 20202026 (annual count)
Bar chart of annual values from 2020 to 2026, in violations. Most recent year (2026): 0 violations.12 violations'20'21'22'23'24'25'260 violations
Anomaly engine

Active signals

UNRESOLVED VIOLATION · SDWIS VIOLATION

Contaminant 0700

Unresolved Drinking water rule (140) violation cited in 2025 (contaminant 0700).

EPA SDWIS record

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 5000

Unresolved Phase I/II/V Inorganic Chemical Rules violation cited in 2024 (contaminant 5000).

EPA SDWIS record

UNRESOLVED VIOLATION · SDWIS VIOLATION

Contaminant 7500

Unresolved Volatile Organic Chemical Rule violation cited in 2022 (contaminant 7500).

EPA SDWIS record

Most-cited contaminants

What This Utility Gets Cited For

  • Contaminant 070012 citations
  • Contaminant 70003 citations
  • Contaminant 75003 citations
  • Contaminant 52002 citations
  • Contaminant 50001 citation
  • Contaminant 20311 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.

MONITORING · CONTAMINANT 0700UNRESOLVED

2025 · Contaminant 0700 · Drinking water rule (140)

Failure to monitor as scheduled

CONTAMINANT CODE 0700

OTHER · CONTAMINANT 7000UNRESOLVED

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

OTHER

CONTAMINANT CODE 7000

MONITORING · CONTAMINANT 5000UNRESOLVED

2024 · Contaminant 5000 · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled

CONTAMINANT CODE 5000

MONITORING · CONTAMINANT 5200

2024 · Contaminant 5200 · Phase I/II/V Inorganic Chemical Rules

Reporting failure; returned to compliance

CONTAMINANT CODE 5200

MONITORING · CONTAMINANT 5200

2024 · Contaminant 5200 · Phase I/II/V Inorganic Chemical Rules

Reporting failure; returned to compliance

CONTAMINANT CODE 5200

HEALTH-BASED · CONTAMINANT 0700

2022 · Contaminant 0700 · Drinking water rule (140)

Treatment technique violation; returned to compliance

CONTAMINANT CODE 0700

HEALTH-BASED · CONTAMINANT 0700

2022 · Contaminant 0700 · Drinking water rule (140)

Treatment technique violation; returned to compliance

CONTAMINANT CODE 0700

HEALTH-BASED · CONTAMINANT 0700

2022 · Contaminant 0700 · Drinking water rule (140)

Treatment technique violation; returned to compliance

CONTAMINANT CODE 0700

OTHER · CONTAMINANT 7500

2022 · Contaminant 7500 · Volatile Organic Chemical Rule

OTHER; returned to compliance

CONTAMINANT CODE 7500

OTHER · CONTAMINANT 7500

2022 · Contaminant 7500 · Volatile Organic Chemical Rule

OTHER; returned to compliance

CONTAMINANT CODE 7500

OTHER · CONTAMINANT 7500UNRESOLVED

2022 · Contaminant 7500 · Volatile Organic Chemical Rule

OTHER

CONTAMINANT CODE 7500

OTHER · CONTAMINANT 7000

2022 · Contaminant 7000 · Phase I/II/V Synthetic Organic Chemical Rules

OTHER; returned to compliance

CONTAMINANT CODE 7000

OTHER · CONTAMINANT 7000

2022 · Contaminant 7000 · Phase I/II/V Synthetic Organic Chemical Rules

OTHER; returned to compliance

CONTAMINANT CODE 7000

MONITORING · CONTAMINANT 0700UNRESOLVED

2021 · Contaminant 0700 · Drinking water rule (140)

Failure to monitor as scheduled

CONTAMINANT CODE 0700

MONITORING · CONTAMINANT 0700

2021 · Contaminant 0700 · Drinking water rule (140)

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 0700

MONITORING · CONTAMINANT 0700

2021 · Contaminant 0700 · Drinking water rule (140)

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 0700

MONITORING · CONTAMINANT 0700

2020 · Contaminant 0700 · Drinking water rule (140)

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 0700

MONITORING · CONTAMINANT 0700UNRESOLVED

2020 · Contaminant 0700 · Drinking water rule (140)

Failure to monitor as scheduled

CONTAMINANT CODE 0700

MONITORING · CONTAMINANT 0700

2020 · Contaminant 0700 · Drinking water rule (140)

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 0700

MONITORING · CONTAMINANT 0700UNRESOLVED

2020 · Contaminant 0700 · Drinking water rule (140)

Failure to monitor as scheduled

CONTAMINANT CODE 0700

MONITORING · CONTAMINANT 0700

2020 · Contaminant 0700 · Drinking water rule (140)

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 0700

MONITORING · CONTAMINANT 2031UNRESOLVED

2020 · Contaminant 2031 · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2031

MONITORING · CONTAMINANT 2040UNRESOLVED

2020 · Contaminant 2040 · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2040

MONITORING · CONTAMINANT 2041UNRESOLVED

2020 · Contaminant 2041 · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2041

MONITORING · ALACHLORUNRESOLVED

2020 · Alachlor · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2105

MONITORING · ATRAZINEUNRESOLVED

2020 · Atrazine · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2110

MONITORING · CONTAMINANT 2326UNRESOLVED

2020 · Contaminant 2326 · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2326

MONITORING · CONTAMINANT 2440UNRESOLVED

2020 · Contaminant 2440 · Lead and Copper Rule

Failure to monitor as scheduled

CONTAMINANT CODE 2440

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

Who Drinks This Water

New Madrid County, Missouri (utility's served county per SDWIS GEOGRAPHIC_AREA — city-level not yet matched): a service population of 16,341. Local disparity score for pm2.5 (fine particulate) sits below the reference (61). Why we surface this →

POPULATION SHARE
17.3%

Low-income

POPULATION SHARE
23.9%

People of color

POPULATION SHARE
5.7%

Under age 5

POPULATION SHARE
19.3%

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.40near the national median
  • OzoneHealth riskGround-level ozone (smog) inflames the airways. Even short exposures trigger asthma attacks and worsen chronic lung and heart disease.53near 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.50near 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.36below 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.55near 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.12below 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.60near 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.40near 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.31below 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.57near 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.77above 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.86in the highest 20% nationally
EJ disparity scores · service-area block groups (100 = national reference; higher = greater disparate burden)
IndicatorDisparity scoreReading
PM2.5 (fine particulate)61below the reference
Ozone88below the reference
Nitrogen dioxide (NO₂)73below the reference
Diesel particulate55below the reference
Toxic releases (RSEI)56below the reference
Traffic proximity16well below the reference
Lead-paint risk (pre-1960 housing)73below the reference
Superfund site proximity0well below the reference
RMP-facility proximity39well below the reference
Hazardous-waste site proximity37well below the reference
Underground storage tanks60below the reference
NPDES wastewater proximity105near the reference
Drinking-water non-compliance60below 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 2020-01-012026-05-07.

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.