Arizona · drinking water · SDWIS through latest publish

Epcor - Agua Fria Water Quality — El Mirage, Arizona

PWSID AZ0407695 · Surface waterPrivate

127,718 people served. 3 health-based SDWIS violations recorded in the past 5 years. 91 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.75 violations'20'21'22'23'24'25'260 violations
Anomaly engine

Active signals

UNRESOLVED VIOLATION · SDWIS VIOLATION

Contaminant 1927

Unresolved Lead and Copper Rule violation cited in 2025 (contaminant 1927).

EPA SDWIS record

UNRESOLVED VIOLATION · SDWIS VIOLATION

Contaminant 1927

Unresolved Lead and Copper Rule violation cited in 2025 (contaminant 1927).

EPA SDWIS record

UNRESOLVED VIOLATION · SDWIS VIOLATION

Contaminant 1925

Unresolved Lead and Copper Rule violation cited in 2025 (contaminant 1925).

EPA SDWIS record

UNRESOLVED VIOLATION · SDWIS VIOLATION

Contaminant 1925

Unresolved Lead and Copper Rule violation cited in 2025 (contaminant 1925).

EPA SDWIS record

Most-cited contaminants

What This Utility Gets Cited For

  • Arsenic27 citations
  • Alachlor19 citations
  • Contaminant 500014 citations
  • Contaminant 19259 citations
  • Beryllium8 citations
  • Contaminant 19272 citations
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 1927UNRESOLVED

2025 · Contaminant 1927 · Lead and Copper Rule

Failure to monitor as scheduled

CONTAMINANT CODE 1927

MONITORING · CONTAMINANT 1927UNRESOLVED

2025 · Contaminant 1927 · Lead and Copper Rule

Failure to monitor as scheduled

CONTAMINANT CODE 1927

MONITORING · CONTAMINANT 1925UNRESOLVED

2025 · Contaminant 1925 · Lead and Copper Rule

Failure to monitor as scheduled

CONTAMINANT CODE 1925

MONITORING · CONTAMINANT 1925UNRESOLVED

2025 · Contaminant 1925 · Lead and Copper Rule

Failure to monitor as scheduled

CONTAMINANT CODE 1925

MONITORING · CONTAMINANT 1925UNRESOLVED

2025 · Contaminant 1925 · Lead and Copper Rule

Failure to monitor as scheduled

CONTAMINANT CODE 1925

MONITORING · CONTAMINANT 1925UNRESOLVED

2025 · Contaminant 1925 · Lead and Copper Rule

Failure to monitor as scheduled

CONTAMINANT CODE 1925

MONITORING · CONTAMINANT 0200

2025 · Contaminant 0200 · Surface Water Treatment Rule

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 0200

MONITORING · ARSENICUNRESOLVED

2024 · Arsenic · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled

CONTAMINANT CODE 1005

MONITORING · ARSENIC

2024 · Arsenic · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 1005

MONITORING · ARSENIC

2024 · Arsenic · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 1005

MONITORING · ARSENIC

2024 · Arsenic · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 1005

MONITORING · ARSENICUNRESOLVED

2024 · Arsenic · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled

CONTAMINANT CODE 1005

MONITORING · ARSENIC

2024 · Arsenic · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 1005

MONITORING · ARSENIC

2024 · Arsenic · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 1005

MONITORING · ARSENIC

2024 · Arsenic · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 1005

MONITORING · BERYLLIUMUNRESOLVED

2024 · Beryllium · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled

CONTAMINANT CODE 1040

MONITORING · BERYLLIUM

2024 · Beryllium · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 1040

MONITORING · BERYLLIUM

2024 · Beryllium · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 1040

MONITORING · BERYLLIUM

2024 · Beryllium · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 1040

MONITORING · ARSENIC

2023 · Arsenic · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 1005

MONITORING · ARSENICUNRESOLVED

2023 · Arsenic · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled

CONTAMINANT CODE 1005

MONITORING · ARSENIC

2023 · Arsenic · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 1005

MONITORING · ARSENIC

2023 · Arsenic · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 1005

MONITORING · ARSENIC

2023 · Arsenic · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 1005

MONITORING · ARSENICUNRESOLVED

2023 · Arsenic · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled

CONTAMINANT CODE 1005

MONITORING · ARSENIC

2023 · Arsenic · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 1005

MONITORING · ARSENIC

2023 · Arsenic · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 1005

MONITORING · ARSENIC

2023 · Arsenic · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 1005

MONITORING · ARSENICUNRESOLVED

2023 · Arsenic · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled

CONTAMINANT CODE 1005

MONITORING · ARSENIC

2023 · Arsenic · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 1005

MONITORING · ARSENIC

2023 · Arsenic · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 1005

MONITORING · ARSENIC

2023 · Arsenic · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 1005

MONITORING · ARSENICUNRESOLVED

2023 · Arsenic · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled

CONTAMINANT CODE 1005

MONITORING · ARSENIC

2023 · Arsenic · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 1005

MONITORING · ARSENIC

2023 · Arsenic · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 1005

MONITORING · BERYLLIUM

2023 · Beryllium · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 1040

MONITORING · BERYLLIUMUNRESOLVED

2023 · Beryllium · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled

CONTAMINANT CODE 1040

MONITORING · BERYLLIUM

2023 · Beryllium · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 1040

MONITORING · BERYLLIUM

2023 · Beryllium · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 1040

MONITORING · ALACHLOR

2023 · Alachlor · Nitrate/Nitrite

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 2105

MONITORING · ALACHLORUNRESOLVED

2023 · Alachlor · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2105

MONITORING · ALACHLOR

2023 · Alachlor · Nitrate/Nitrite

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 2105

MONITORING · ALACHLOR

2023 · Alachlor · Nitrate/Nitrite

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 2105

MONITORING · ALACHLOR

2023 · Alachlor · Nitrate/Nitrite

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 2105

MONITORING · ALACHLORUNRESOLVED

2023 · Alachlor · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2105

MONITORING · ALACHLOR

2023 · Alachlor · Nitrate/Nitrite

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 2105

MONITORING · ALACHLOR

2023 · Alachlor · Nitrate/Nitrite

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 2105

MONITORING · CONTAMINANT 1925

2023 · Contaminant 1925 · Lead and Copper Rule

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 1925

MONITORING · CONTAMINANT 1925

2023 · Contaminant 1925 · Lead and Copper Rule

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 1925

MONITORING · CONTAMINANT 1925

2023 · Contaminant 1925 · Lead and Copper Rule

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 1925

MONITORING · CONTAMINANT 5000UNRESOLVED

2023 · Contaminant 5000 · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled

CONTAMINANT CODE 5000

MONITORING · ALACHLORUNRESOLVED

2023 · Alachlor · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2105

MONITORING · ALACHLOR

2023 · Alachlor · Nitrate/Nitrite

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 2105

MONITORING · ALACHLOR

2023 · Alachlor · Nitrate/Nitrite

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 2105

MONITORING · CONTAMINANT 1925

2022 · Contaminant 1925 · Lead and Copper Rule

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 1925

MONITORING · CONTAMINANT 1925

2022 · Contaminant 1925 · Lead and Copper Rule

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 1925

MONITORING · CONTAMINANT 5000UNRESOLVED

2022 · Contaminant 5000 · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled

CONTAMINANT CODE 5000

MONITORING · CONTAMINANT 5000UNRESOLVED

2022 · Contaminant 5000 · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled

CONTAMINANT CODE 5000

HEALTH-BASED · CONTAMINANT 5000

2022 · Contaminant 5000 · Phase I/II/V Inorganic Chemical Rules

Treatment technique violation; returned to compliance

CONTAMINANT CODE 5000

HEALTH-BASED · CONTAMINANT 5000

2022 · Contaminant 5000 · Phase I/II/V Inorganic Chemical Rules

Treatment technique violation; returned to compliance

CONTAMINANT CODE 5000

HEALTH-BASED · CONTAMINANT 5000

2022 · Contaminant 5000 · Phase I/II/V Inorganic Chemical Rules

Treatment technique violation; returned to compliance

CONTAMINANT CODE 5000

MONITORING · ARSENICUNRESOLVED

2022 · Arsenic · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled

CONTAMINANT CODE 1005

MONITORING · ARSENIC

2022 · Arsenic · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 1005

MONITORING · ARSENIC

2022 · Arsenic · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 1005

MONITORING · ALACHLORUNRESOLVED

2022 · Alachlor · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2105

MONITORING · ALACHLOR

2022 · Alachlor · Nitrate/Nitrite

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 2105

MONITORING · ALACHLOR

2022 · Alachlor · Nitrate/Nitrite

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 2105

MONITORING · ALACHLORUNRESOLVED

2022 · Alachlor · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2105

MONITORING · ALACHLOR

2022 · Alachlor · Nitrate/Nitrite

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 2105

MONITORING · ALACHLOR

2022 · Alachlor · Nitrate/Nitrite

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 2105

MONITORING · CONTAMINANT 5000

2021 · Contaminant 5000 · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 5000

MONITORING · CONTAMINANT 5000

2021 · Contaminant 5000 · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 5000

MONITORING · CONTAMINANT 5000

2021 · Contaminant 5000 · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 5000

MONITORING · CONTAMINANT 5000

2021 · Contaminant 5000 · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 5000

MONITORING · CONTAMINANT 5000

2021 · Contaminant 5000 · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 5000

MONITORING · CONTAMINANT 5000

2021 · Contaminant 5000 · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 5000

MONITORING · CONTAMINANT 5000

2021 · Contaminant 5000 · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 5000

MONITORING · CONTAMINANT 2959UNRESOLVED

2021 · Contaminant 2959 · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2959

MONITORING · CONTAMINANT 2959UNRESOLVED

2021 · Contaminant 2959 · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2959

MONITORING · CONTAMINANT 2400UNRESOLVED

2021 · Contaminant 2400 · Lead and Copper Rule

Failure to monitor as scheduled

CONTAMINANT CODE 2400

MONITORING · CONTAMINANT 2400UNRESOLVED

2021 · Contaminant 2400 · Lead and Copper Rule

Failure to monitor as scheduled

CONTAMINANT CODE 2400

MONITORING · CONTAMINANT 2398UNRESOLVED

2021 · Contaminant 2398 · Lead and Copper Rule

Failure to monitor as scheduled

CONTAMINANT CODE 2398

MONITORING · CONTAMINANT 2398UNRESOLVED

2021 · Contaminant 2398 · Lead and Copper Rule

Failure to monitor as scheduled

CONTAMINANT CODE 2398

MONITORING · CONTAMINANT 2396UNRESOLVED

2021 · Contaminant 2396 · Lead and Copper Rule

Failure to monitor as scheduled

CONTAMINANT CODE 2396

MONITORING · CONTAMINANT 2396UNRESOLVED

2021 · Contaminant 2396 · Lead and Copper Rule

Failure to monitor as scheduled

CONTAMINANT CODE 2396

MONITORING · CONTAMINANT 2394UNRESOLVED

2021 · Contaminant 2394 · Lead and Copper Rule

Failure to monitor as scheduled

CONTAMINANT CODE 2394

MONITORING · CONTAMINANT 2394UNRESOLVED

2021 · Contaminant 2394 · Lead and Copper Rule

Failure to monitor as scheduled

CONTAMINANT CODE 2394

MONITORING · CONTAMINANT 2392UNRESOLVED

2021 · Contaminant 2392 · Lead and Copper Rule

Failure to monitor as scheduled

CONTAMINANT CODE 2392

MONITORING · CONTAMINANT 2392UNRESOLVED

2021 · Contaminant 2392 · Lead and Copper Rule

Failure to monitor as scheduled

CONTAMINANT CODE 2392

MONITORING · CONTAMINANT 2390UNRESOLVED

2021 · Contaminant 2390 · Lead and Copper Rule

Failure to monitor as scheduled

CONTAMINANT CODE 2390

MONITORING · CONTAMINANT 2390UNRESOLVED

2021 · Contaminant 2390 · Lead and Copper Rule

Failure to monitor as scheduled

CONTAMINANT CODE 2390

MONITORING · VINYL CHLORIDEUNRESOLVED

2021 · Vinyl chloride · Lead and Copper Rule

Failure to monitor as scheduled

CONTAMINANT CODE 2388

MONITORING · VINYL CHLORIDEUNRESOLVED

2021 · Vinyl chloride · Lead and Copper Rule

Failure to monitor as scheduled

CONTAMINANT CODE 2388

MONITORING · CONTAMINANT 2326UNRESOLVED

2021 · Contaminant 2326 · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2326

MONITORING · CONTAMINANT 2326UNRESOLVED

2021 · Contaminant 2326 · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2326

MONITORING · CARBOFURANUNRESOLVED

2021 · Carbofuran · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2306

MONITORING · CARBOFURANUNRESOLVED

2021 · Carbofuran · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2306

MONITORING · CONTAMINANT 2274UNRESOLVED

2021 · Contaminant 2274 · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2274

MONITORING · CONTAMINANT 2274UNRESOLVED

2021 · Contaminant 2274 · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2274

MONITORING · ATRAZINEUNRESOLVED

2021 · Atrazine · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2110

MONITORING · ATRAZINEUNRESOLVED

2021 · Atrazine · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2110

MONITORING · ALACHLORUNRESOLVED

2021 · Alachlor · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2105

MONITORING · ALACHLORUNRESOLVED

2021 · Alachlor · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2105

MONITORING · CONTAMINANT 2067UNRESOLVED

2021 · Contaminant 2067 · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2067

MONITORING · CONTAMINANT 2067UNRESOLVED

2021 · Contaminant 2067 · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2067

MONITORING · 2,4,5-TP (SILVEX)UNRESOLVED

2021 · 2,4,5-TP (Silvex) · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2065

MONITORING · 2,4,5-TP (SILVEX)UNRESOLVED

2021 · 2,4,5-TP (Silvex) · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2065

MONITORING · CONTAMINANT 2063UNRESOLVED

2021 · Contaminant 2063 · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2063

MONITORING · CONTAMINANT 2063UNRESOLVED

2021 · Contaminant 2063 · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2063

MONITORING · CONTAMINANT 2051UNRESOLVED

2021 · Contaminant 2051 · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2051

MONITORING · CONTAMINANT 2051UNRESOLVED

2021 · Contaminant 2051 · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2051

MONITORING · 2,4-DUNRESOLVED

2021 · 2,4-D · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2050

MONITORING · 2,4-DUNRESOLVED

2021 · 2,4-D · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2050

MONITORING · CONTAMINANT 2046UNRESOLVED

2021 · Contaminant 2046 · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2046

MONITORING · CONTAMINANT 2046UNRESOLVED

2021 · Contaminant 2046 · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2046

MONITORING · CONTAMINANT 2042UNRESOLVED

2021 · Contaminant 2042 · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2042

MONITORING · CONTAMINANT 2042UNRESOLVED

2021 · Contaminant 2042 · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2042

MONITORING · CONTAMINANT 2041UNRESOLVED

2021 · Contaminant 2041 · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2041

MONITORING · CONTAMINANT 2041UNRESOLVED

2021 · Contaminant 2041 · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2041

MONITORING · CONTAMINANT 2040UNRESOLVED

2021 · Contaminant 2040 · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2040

MONITORING · CONTAMINANT 2040UNRESOLVED

2021 · Contaminant 2040 · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2040

MONITORING · CONTAMINANT 2039UNRESOLVED

2021 · Contaminant 2039 · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2039

MONITORING · CONTAMINANT 2039UNRESOLVED

2021 · Contaminant 2039 · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2039

MONITORING · CONTAMINANT 2037UNRESOLVED

2021 · Contaminant 2037 · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2037

MONITORING · CONTAMINANT 2037UNRESOLVED

2021 · Contaminant 2037 · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2037

MONITORING · CONTAMINANT 2036UNRESOLVED

2021 · Contaminant 2036 · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2036

MONITORING · CONTAMINANT 2036UNRESOLVED

2021 · Contaminant 2036 · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2036

MONITORING · CONTAMINANT 2035UNRESOLVED

2021 · Contaminant 2035 · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2035

MONITORING · CONTAMINANT 2035UNRESOLVED

2021 · Contaminant 2035 · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2035

MONITORING · CONTAMINANT 2034UNRESOLVED

2021 · Contaminant 2034 · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2034

MONITORING · CONTAMINANT 2034UNRESOLVED

2021 · Contaminant 2034 · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2034

MONITORING · CONTAMINANT 2033UNRESOLVED

2021 · Contaminant 2033 · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2033

MONITORING · CONTAMINANT 2033UNRESOLVED

2021 · Contaminant 2033 · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2033

MONITORING · CONTAMINANT 2032UNRESOLVED

2021 · Contaminant 2032 · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2032

MONITORING · CONTAMINANT 2032UNRESOLVED

2021 · Contaminant 2032 · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2032

MONITORING · CONTAMINANT 2031UNRESOLVED

2021 · Contaminant 2031 · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2031

MONITORING · CONTAMINANT 2031UNRESOLVED

2021 · Contaminant 2031 · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2031

MONITORING · TOXAPHENEUNRESOLVED

2021 · Toxaphene · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2020

MONITORING · TOXAPHENEUNRESOLVED

2021 · Toxaphene · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2020

MONITORING · METHOXYCHLORUNRESOLVED

2021 · Methoxychlor · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2015

MONITORING · METHOXYCHLORUNRESOLVED

2021 · Methoxychlor · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2015

MONITORING · LINDANEUNRESOLVED

2021 · Lindane · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2010

MONITORING · LINDANEUNRESOLVED

2021 · Lindane · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2010

MONITORING · ENDRINUNRESOLVED

2021 · Endrin · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2005

MONITORING · ENDRINUNRESOLVED

2021 · Endrin · Nitrate/Nitrite

Failure to monitor as scheduled

CONTAMINANT CODE 2005

MONITORING · CONTAMINANT 5000

2020 · Contaminant 5000 · Phase I/II/V Inorganic Chemical Rules

Failure to monitor as scheduled; returned to compliance

CONTAMINANT CODE 5000

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

Who Drinks This Water

El Mirage, Arizona (Census place; block-group disparity scores aggregated by centroid containment): a service population of 35,652. Local disparity score for pm2.5 (fine particulate) sits near the reference (99). Why we surface this →

POPULATION SHARE
13.4%

Low-income

POPULATION SHARE
65.9%

People of color

POPULATION SHARE
7.5%

Under age 5

POPULATION SHARE
10.2%

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.52near the national median
  • OzoneHealth riskGround-level ozone (smog) inflames the airways. Even short exposures trigger asthma attacks and worsen chronic lung and heart disease.93in the highest 10% nationally
  • 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.79above 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.78above 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.46near 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.61above 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.23below 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.28below 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.21below 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.46near 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.84in the highest 20% nationally
  • 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.92in the highest 10% nationally
EJ disparity scores · service-area block groups (100 = national reference; higher = greater disparate burden)
IndicatorDisparity scoreReading
PM2.5 (fine particulate)99near the reference
Ozone174well above the reference burden
Nitrogen dioxide (NO₂)145moderately above the reference
Diesel particulate144moderately above the reference
Toxic releases (RSEI)85below the reference
Traffic proximity113moderately above the reference
Lead-paint risk (pre-1960 housing)18well below the reference
Superfund site proximity1well below the reference
RMP-facility proximity38well below the reference
Hazardous-waste site proximity42well below the reference
Underground storage tanks48well below the reference
NPDES wastewater proximity153well above the reference burden
Drinking-water non-compliance168well above the reference burden

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.