S

Sonoita, AZ

—no score

Contamination score

Higher = more contaminated vs. other cities.

⚠️4 health-based violations on record.
0
Water sources
68
Violations
0
Pollution sources
0
Self-reported
0
Lawsuits

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Reported illness & cancer claims

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Self-reported issues

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Pollution sources & reported claims near your water

Factories, greenhouses, and contaminated sites mapped around the water supply. Tap any circle for detail.

Critical High Medium Reported claim

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Public water systems

Casas Arroyo Association Inc

PWSID:
AZ0412020
Source:
Ground water
Serves:
27 people

Sonoita Valley (South) Water Company

PWSID:
AZ0412005
Source:
Ground water
Serves:
169 people

Sonoita Valley (North) Water Company

PWSID:
AZ0412308
Source:
Ground water
Serves:
49 people

EPA & DEP violations

Sonoita Valley (South) Water Company

PWSID AZ041200532 violations

  • Other violation — SONOITA VALLEY (SOUTH) WATER COMPANY

    low severityOpen

    EPA SDWIS violation 4786 (code 75) at SONOITA VALLEY (SOUTH) WATER COMPANY (PWSID AZ0412005).

    EPA SDWIS · Other violation · Began Oct 18, 2025 · 9 months ago · Source ↗

  • Other violation — SONOITA VALLEY (SOUTH) WATER COMPANY

    low severityOpen

    EPA SDWIS violation 4783 (code 75) at SONOITA VALLEY (SOUTH) WATER COMPANY (PWSID AZ0412005).

    EPA SDWIS · Other violation · Began Dec 20, 2024 · 1 year ago · Source ↗

  • Reporting violation — SONOITA VALLEY (SOUTH) WATER COMPANY

    low severityResolved

    EPA SDWIS violation 4781 (code 4G) at SONOITA VALLEY (SOUTH) WATER COMPANY (PWSID AZ0412005).

    EPA SDWIS · Reporting violation · Began Oct 17, 2024 · 1 year ago · Source ↗

  • Treatment technique violation — SONOITA VALLEY (SOUTH) WATER COMPANY

    high severityHealth-basedResolved

    EPA SDWIS violation 4782 (code 2E) at SONOITA VALLEY (SOUTH) WATER COMPANY (PWSID AZ0412005).

    EPA SDWIS · Treatment technique violation · Began Oct 17, 2024 · 1 year ago · Source ↗

  • Monitoring violation — SONOITA VALLEY (SOUTH) WATER COMPANY

    low severityResolved

    EPA SDWIS violation 4784 (code 03) at SONOITA VALLEY (SOUTH) WATER COMPANY (PWSID AZ0412005).

    EPA SDWIS · Monitoring violation · Began Oct 1, 2024 · 1 year ago · Source ↗

  • Monitoring violation — SONOITA VALLEY (SOUTH) WATER COMPANY

    low severityResolved

    EPA SDWIS violation 4785 (code 03) at SONOITA VALLEY (SOUTH) WATER COMPANY (PWSID AZ0412005).

    EPA SDWIS · Monitoring violation · Began Oct 1, 2024 · 1 year ago · Source ↗

  • Other violation — SONOITA VALLEY (SOUTH) WATER COMPANY

    low severityResolved

    EPA SDWIS violation 4779 (code 75) at SONOITA VALLEY (SOUTH) WATER COMPANY (PWSID AZ0412005).

    EPA SDWIS · Other violation · Began Apr 28, 2024 · 2 years ago · Source ↗

  • Other violation — SONOITA VALLEY (SOUTH) WATER COMPANY

    low severityResolved

    EPA SDWIS violation 4780 (code 75) at SONOITA VALLEY (SOUTH) WATER COMPANY (PWSID AZ0412005).

    EPA SDWIS · Other violation · Began Apr 28, 2024 · 2 years ago · Source ↗

  • Other violation — SONOITA VALLEY (SOUTH) WATER COMPANY

    low severityResolved

    EPA SDWIS violation 4777 (code 75) at SONOITA VALLEY (SOUTH) WATER COMPANY (PWSID AZ0412005).

    EPA SDWIS · Other violation · Began May 18, 2023 · 3 years ago · Source ↗

  • Other violation — SONOITA VALLEY (SOUTH) WATER COMPANY

    low severityResolved

    EPA SDWIS violation 4778 (code 75) at SONOITA VALLEY (SOUTH) WATER COMPANY (PWSID AZ0412005).

    EPA SDWIS · Other violation · Began May 18, 2023 · 3 years ago · Source ↗

  • Monitoring violation — SONOITA VALLEY (SOUTH) WATER COMPANY

    low severityResolved

    EPA SDWIS violation 4775 (code 03) at SONOITA VALLEY (SOUTH) WATER COMPANY (PWSID AZ0412005).

    EPA SDWIS · Monitoring violation · Began Jan 1, 2023 · 3 years ago · Source ↗

  • Monitoring violation — SONOITA VALLEY (SOUTH) WATER COMPANY

    low severityResolved

    EPA SDWIS violation 4776 (code 03) at SONOITA VALLEY (SOUTH) WATER COMPANY (PWSID AZ0412005).

    EPA SDWIS · Monitoring violation · Began Jan 1, 2023 · 3 years ago · Source ↗

  • Monitoring violation — SONOITA VALLEY (SOUTH) WATER COMPANY

    low severityResolved

    EPA SDWIS violation 4773 (code 03) at SONOITA VALLEY (SOUTH) WATER COMPANY (PWSID AZ0412005).

    EPA SDWIS · Monitoring violation · Began Oct 1, 2022 · 3 years ago · Source ↗

  • Monitoring violation — SONOITA VALLEY (SOUTH) WATER COMPANY

    low severityResolved

    EPA SDWIS violation 4774 (code 03) at SONOITA VALLEY (SOUTH) WATER COMPANY (PWSID AZ0412005).

    EPA SDWIS · Monitoring violation · Began Oct 1, 2022 · 3 years ago · Source ↗

  • Monitoring violation — SONOITA VALLEY (SOUTH) WATER COMPANY

    low severityResolved

    EPA SDWIS violation 4771 (code 03) at SONOITA VALLEY (SOUTH) WATER COMPANY (PWSID AZ0412005).

    EPA SDWIS · Monitoring violation · Began Jan 1, 2022 · 4 years ago · Source ↗

  • Monitoring violation — SONOITA VALLEY (SOUTH) WATER COMPANY

    low severityResolved

    EPA SDWIS violation 4772 (code 03) at SONOITA VALLEY (SOUTH) WATER COMPANY (PWSID AZ0412005).

    EPA SDWIS · Monitoring violation · Began Jan 1, 2022 · 4 years ago · Source ↗

  • Monitoring violation — SONOITA VALLEY (SOUTH) WATER COMPANY

    low severityResolved

    EPA SDWIS violation 4769 (code 03) at SONOITA VALLEY (SOUTH) WATER COMPANY (PWSID AZ0412005).

    EPA SDWIS · Monitoring violation · Began Jul 1, 2021 · 5 years ago · Source ↗

  • Monitoring violation — SONOITA VALLEY (SOUTH) WATER COMPANY

    low severityResolved

    EPA SDWIS violation 4770 (code 03) at SONOITA VALLEY (SOUTH) WATER COMPANY (PWSID AZ0412005).

    EPA SDWIS · Monitoring violation · Began Jul 1, 2021 · 5 years ago · Source ↗

  • Monitoring violation — SONOITA VALLEY (SOUTH) WATER COMPANY

    low severityResolved

    EPA SDWIS violation 4767 (code 03) at SONOITA VALLEY (SOUTH) WATER COMPANY (PWSID AZ0412005).

    EPA SDWIS · Monitoring violation · Began Apr 1, 2021 · 5 years ago · Source ↗

  • Monitoring violation — SONOITA VALLEY (SOUTH) WATER COMPANY

    low severityResolved

    EPA SDWIS violation 4768 (code 03) at SONOITA VALLEY (SOUTH) WATER COMPANY (PWSID AZ0412005).

    EPA SDWIS · Monitoring violation · Began Apr 1, 2021 · 5 years ago · Source ↗

  • Monitoring violation — SONOITA VALLEY (SOUTH) WATER COMPANY

    low severityResolved

    EPA SDWIS violation 4764 (code 03) at SONOITA VALLEY (SOUTH) WATER COMPANY (PWSID AZ0412005).

    EPA SDWIS · Monitoring violation · Began Jul 1, 2020 · 6 years ago · Source ↗

  • Monitoring violation — SONOITA VALLEY (SOUTH) WATER COMPANY

    low severityResolved

    EPA SDWIS violation 4765 (code 03) at SONOITA VALLEY (SOUTH) WATER COMPANY (PWSID AZ0412005).

    EPA SDWIS · Monitoring violation · Began Jul 1, 2020 · 6 years ago · Source ↗

  • Other violation — SONOITA VALLEY (SOUTH) WATER COMPANY

    low severityResolved

    EPA SDWIS violation 4759 (code 71) at SONOITA VALLEY (SOUTH) WATER COMPANY (PWSID AZ0412005).

    EPA SDWIS · Other violation · Began Jul 1, 2019 · 7 years ago · Source ↗

  • Monitoring violation — SONOITA VALLEY (SOUTH) WATER COMPANY

    low severityResolved

    EPA SDWIS violation 4760 (code 27) at SONOITA VALLEY (SOUTH) WATER COMPANY (PWSID AZ0412005).

    EPA SDWIS · Monitoring violation · Began Apr 1, 2019 · 7 years ago · Source ↗

  • Monitoring violation — SONOITA VALLEY (SOUTH) WATER COMPANY

    low severityResolved

    EPA SDWIS violation 4758 (code 66) at SONOITA VALLEY (SOUTH) WATER COMPANY (PWSID AZ0412005).

    EPA SDWIS · Monitoring violation · Began Jan 1, 2019 · 7 years ago · Source ↗

  • Monitoring violation — SONOITA VALLEY (SOUTH) WATER COMPANY

    low severityResolved

    EPA SDWIS violation 4757 (code 03) at SONOITA VALLEY (SOUTH) WATER COMPANY (PWSID AZ0412005).

    EPA SDWIS · Monitoring violation · Began Jul 1, 2018 · 8 years ago · Source ↗

  • Monitoring violation — SONOITA VALLEY (SOUTH) WATER COMPANY

    low severityResolved

    EPA SDWIS violation 4750 (code 27) at SONOITA VALLEY (SOUTH) WATER COMPANY (PWSID AZ0412005).

    EPA SDWIS · Monitoring violation · Began Oct 1, 2015 · 10 years ago · Source ↗

  • Other violation — SONOITA VALLEY (SOUTH) WATER COMPANY

    low severityResolved

    EPA SDWIS violation 4729 (code 71) at SONOITA VALLEY (SOUTH) WATER COMPANY (PWSID AZ0412005).

    EPA SDWIS · Other violation · Began Jul 1, 2009 · 17 years ago · Source ↗

  • Other violation — SONOITA VALLEY (SOUTH) WATER COMPANY

    low severityResolved

    EPA SDWIS violation 4728 (code 71) at SONOITA VALLEY (SOUTH) WATER COMPANY (PWSID AZ0412005).

    EPA SDWIS · Other violation · Began Jul 1, 2008 · 18 years ago · Source ↗

  • Monitoring violation — SONOITA VALLEY (SOUTH) WATER COMPANY

    low severityResolved

    EPA SDWIS violation 4705 (code 52) at SONOITA VALLEY (SOUTH) WATER COMPANY (PWSID AZ0412005).

    EPA SDWIS · Monitoring violation · Began Oct 1, 2005 · 20 years ago · Source ↗

  • Monitoring violation — SONOITA VALLEY (SOUTH) WATER COMPANY

    low severityResolved

    EPA SDWIS violation 4706 (code 52) at SONOITA VALLEY (SOUTH) WATER COMPANY (PWSID AZ0412005).

    EPA SDWIS · Monitoring violation · Began Oct 1, 2004 · 21 years ago · Source ↗

  • Other violation — SONOITA VALLEY (SOUTH) WATER COMPANY

    low severityResolved

    EPA SDWIS violation 4726 (code 71) at SONOITA VALLEY (SOUTH) WATER COMPANY (PWSID AZ0412005).

    EPA SDWIS · Other violation · Began Jul 1, 2003 · 23 years ago · Source ↗

Sonoita Valley (North) Water Company

PWSID AZ041230816 violations

  • Monitoring violation — SONOITA VALLEY (NORTH) WATER COMPANY

    low severityResolved

    EPA SDWIS violation 6662 (code 27) at SONOITA VALLEY (NORTH) WATER COMPANY (PWSID AZ0412308).

    EPA SDWIS · Monitoring violation · Began Sep 1, 2019 · 6 years ago · Source ↗

  • Monitoring violation — SONOITA VALLEY (NORTH) WATER COMPANY

    low severityResolved

    EPA SDWIS violation 6663 (code 27) at SONOITA VALLEY (NORTH) WATER COMPANY (PWSID AZ0412308).

    EPA SDWIS · Monitoring violation · Began Sep 1, 2019 · 6 years ago · Source ↗

  • Other violation — SONOITA VALLEY (NORTH) WATER COMPANY

    low severityResolved

    EPA SDWIS violation 6661 (code 71) at SONOITA VALLEY (NORTH) WATER COMPANY (PWSID AZ0412308).

    EPA SDWIS · Other violation · Began Jul 1, 2019 · 7 years ago · Source ↗

  • Monitoring violation — SONOITA VALLEY (NORTH) WATER COMPANY

    low severityResolved

    EPA SDWIS violation 6660 (code 27) at SONOITA VALLEY (NORTH) WATER COMPANY (PWSID AZ0412308).

    EPA SDWIS · Monitoring violation · Began Jul 1, 2018 · 8 years ago · Source ↗

  • Monitoring violation — SONOITA VALLEY (NORTH) WATER COMPANY

    low severityResolved

    EPA SDWIS violation 6656 (code 27) at SONOITA VALLEY (NORTH) WATER COMPANY (PWSID AZ0412308).

    EPA SDWIS · Monitoring violation · Began Sep 1, 2017 · 8 years ago · Source ↗

  • Monitoring violation — SONOITA VALLEY (NORTH) WATER COMPANY

    low severityResolved

    EPA SDWIS violation 6657 (code 27) at SONOITA VALLEY (NORTH) WATER COMPANY (PWSID AZ0412308).

    EPA SDWIS · Monitoring violation · Began Sep 1, 2017 · 8 years ago · Source ↗

  • Monitoring violation — SONOITA VALLEY (NORTH) WATER COMPANY

    low severityResolved

    EPA SDWIS violation 6653 (code 27) at SONOITA VALLEY (NORTH) WATER COMPANY (PWSID AZ0412308).

    EPA SDWIS · Monitoring violation · Began Oct 1, 2015 · 10 years ago · Source ↗

  • Other violation — SONOITA VALLEY (NORTH) WATER COMPANY

    low severityResolved

    EPA SDWIS violation 6637 (code 72) at SONOITA VALLEY (NORTH) WATER COMPANY (PWSID AZ0412308).

    EPA SDWIS · Other violation · Began Oct 1, 2012 · 13 years ago · Source ↗

  • Other violation — SONOITA VALLEY (NORTH) WATER COMPANY

    low severityResolved

    EPA SDWIS violation 6636 (code 71) at SONOITA VALLEY (NORTH) WATER COMPANY (PWSID AZ0412308).

    EPA SDWIS · Other violation · Began Jul 1, 2012 · 14 years ago · Source ↗

  • Other violation — SONOITA VALLEY (NORTH) WATER COMPANY

    low severityResolved

    EPA SDWIS violation 6641 (code 71) at SONOITA VALLEY (NORTH) WATER COMPANY (PWSID AZ0412308).

    EPA SDWIS · Other violation · Began Jul 1, 2009 · 17 years ago · Source ↗

  • Other violation — SONOITA VALLEY (NORTH) WATER COMPANY

    low severityResolved

    EPA SDWIS violation 6640 (code 71) at SONOITA VALLEY (NORTH) WATER COMPANY (PWSID AZ0412308).

    EPA SDWIS · Other violation · Began Jul 1, 2008 · 18 years ago · Source ↗

  • Other violation — SONOITA VALLEY (NORTH) WATER COMPANY

    low severityResolved

    EPA SDWIS violation 6639 (code 71) at SONOITA VALLEY (NORTH) WATER COMPANY (PWSID AZ0412308).

    EPA SDWIS · Other violation · Began Jul 1, 2005 · 21 years ago · Source ↗

  • Other violation — SONOITA VALLEY (NORTH) WATER COMPANY

    low severityResolved

    EPA SDWIS violation 6305 (code 71) at SONOITA VALLEY (NORTH) WATER COMPANY (PWSID AZ0412308).

    EPA SDWIS · Other violation · Began Jul 1, 2004 · 22 years ago · Source ↗

  • Other violation — SONOITA VALLEY (NORTH) WATER COMPANY

    low severityResolved

    EPA SDWIS violation 6205 (code 71) at SONOITA VALLEY (NORTH) WATER COMPANY (PWSID AZ0412308).

    EPA SDWIS · Other violation · Began Jul 1, 2003 · 23 years ago · Source ↗

  • Other violation — SONOITA VALLEY (NORTH) WATER COMPANY

    low severityResolved

    EPA SDWIS violation 6105 (code 71) at SONOITA VALLEY (NORTH) WATER COMPANY (PWSID AZ0412308).

    EPA SDWIS · Other violation · Began Jul 1, 2002 · 24 years ago · Source ↗

  • Monitoring violation — SONOITA VALLEY (NORTH) WATER COMPANY

    low severityResolved

    EPA SDWIS violation 5202 (code 51) at SONOITA VALLEY (NORTH) WATER COMPANY (PWSID AZ0412308).

    EPA SDWIS · Monitoring violation · Began Jul 1, 2001 · 25 years ago · Source ↗

City-wide

20 violations

  • Public Notice — Other violation

    medium severityUnaddressed

    Public Notice Other violation (Unaddressed).

    EPA SDWIS · Other · Began Oct 18, 2025 · 9 months ago · Source ↗

  • Public Notice — Other violation

    medium severityResolved

    Public Notice Other violation (Resolved).

    EPA SDWIS · Other · Began May 12, 2025 · 1 year ago · Source ↗

  • Groundwater Rule — TT violation

    high severityHealth-basedResolved

    Groundwater Rule TT violation (Resolved).

    EPA SDWIS · TT · Began Mar 23, 2025 · 1 year ago · Source ↗

  • Public Notice — Other violation

    medium severityResolved

    Public Notice Other violation (Resolved).

    EPA SDWIS · Other · Began Dec 20, 2024 · 1 year ago · Source ↗

  • Public Notice — Other violation

    medium severityUnaddressed

    Public Notice Other violation (Unaddressed).

    EPA SDWIS · Other · Began Dec 20, 2024 · 1 year ago · Source ↗

  • LEAD AND COPPER RULE REVISIONS — RPT violation

    medium severityResolved

    LEAD AND COPPER RULE REVISIONS RPT violation (Resolved).

    EPA SDWIS · RPT · Began Oct 17, 2024 · 1 year ago · Source ↗

  • LEAD AND COPPER RULE REVISIONS — TT violation

    high severityHealth-basedResolved

    LEAD AND COPPER RULE REVISIONS TT violation (Resolved).

    EPA SDWIS · TT · Began Oct 17, 2024 · 1 year ago · Source ↗

  • LEAD AND COPPER RULE REVISIONS — RPT violation

    medium severityResolved

    LEAD AND COPPER RULE REVISIONS RPT violation (Resolved).

    EPA SDWIS · RPT · Began Oct 17, 2024 · 1 year ago · Source ↗

  • LEAD AND COPPER RULE REVISIONS — TT violation

    high severityHealth-basedResolved

    LEAD AND COPPER RULE REVISIONS TT violation (Resolved).

    EPA SDWIS · TT · Began Oct 17, 2024 · 1 year ago · Source ↗

  • Lead and Copper Rule — MR violation

    medium severityResolved

    Lead and Copper Rule MR violation (Resolved).

    EPA SDWIS · MR · Began Oct 1, 2024 · 1 year ago · Source ↗

  • Combined Uranium — MR violation

    medium severityResolved

    Combined Uranium MR violation (Resolved).

    EPA SDWIS · MR · Began Oct 1, 2024 · 1 year ago · Source ↗

  • Gross Alpha, Excl. Radon and U — MR violation

    medium severityResolved

    Gross Alpha, Excl. Radon and U MR violation (Resolved).

    EPA SDWIS · MR · Began Oct 1, 2024 · 1 year ago · Source ↗

  • Public Notice — Other violation

    medium severityResolved

    Public Notice Other violation (Resolved).

    EPA SDWIS · Other · Began Apr 28, 2024 · 2 years ago · Source ↗

  • Public Notice — Other violation

    medium severityResolved

    Public Notice Other violation (Resolved).

    EPA SDWIS · Other · Began Apr 28, 2024 · 2 years ago · Source ↗

  • Public Notice — Other violation

    medium severityResolved

    Public Notice Other violation (Resolved).

    EPA SDWIS · Other · Began May 18, 2023 · 3 years ago · Source ↗

  • Public Notice — Other violation

    medium severityResolved

    Public Notice Other violation (Resolved).

    EPA SDWIS · Other · Began May 18, 2023 · 3 years ago · Source ↗

  • Combined Uranium — MR violation

    medium severityResolved

    Combined Uranium MR violation (Resolved).

    EPA SDWIS · MR · Began Jan 1, 2023 · 3 years ago · Source ↗

  • Gross Alpha, Excl. Radon and U — MR violation

    medium severityResolved

    Gross Alpha, Excl. Radon and U MR violation (Resolved).

    EPA SDWIS · MR · Began Jan 1, 2023 · 3 years ago · Source ↗

  • Revised Total Coliform Rule — RPT violation

    medium severityResolved

    Revised Total Coliform Rule RPT violation (Resolved).

    EPA SDWIS · RPT · Began Dec 1, 2022 · 3 years ago · Source ↗

  • Consumer Confidence Rule — Other violation

    medium severityResolved

    Consumer Confidence Rule Other violation (Resolved).

    EPA SDWIS · Other · Began Oct 2, 2022 · 3 years ago · Source ↗

Water-related lawsuits

No lawsuits on record.

In the news & sources

No coverage linked yet.