Sonoita, AZ
Contamination score
Higher = more contaminated vs. other cities.
Reported illness & cancer claims
No claims reported yet. Be the first to add one.
Claims are aggregated from public records and community reports and may be unverified. If you believe your illness is linked to local water, request a consultation.
Self-reported issues
No issues reported yet. Be the first to report one.

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
Public Notice — Other violation
medium severityUnaddressedPublic Notice Other violation (Unaddressed).
EPA SDWIS · Other · Began Oct 18, 2025 · 7 months ago · Source ↗
Public Notice — Other violation
medium severityResolvedPublic Notice Other violation (Resolved).
EPA SDWIS · Other · Began May 12, 2025 · 1 year ago · Source ↗
Groundwater Rule — TT violation
high severityHealth-basedResolvedGroundwater Rule TT violation (Resolved).
EPA SDWIS · TT · Began Mar 23, 2025 · 1 year ago · Source ↗
Public Notice — Other violation
medium severityResolvedPublic Notice Other violation (Resolved).
EPA SDWIS · Other · Began Dec 20, 2024 · 1 year ago · Source ↗
Public Notice — Other violation
medium severityUnaddressedPublic Notice Other violation (Unaddressed).
EPA SDWIS · Other · Began Dec 20, 2024 · 1 year ago · Source ↗
LEAD AND COPPER RULE REVISIONS — RPT violation
medium severityResolvedLEAD 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-basedResolvedLEAD 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 severityResolvedLEAD 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-basedResolvedLEAD 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 severityResolvedLead and Copper Rule MR violation (Resolved).
EPA SDWIS · MR · Began Oct 1, 2024 · 1 year ago · Source ↗
Combined Uranium — MR violation
medium severityResolvedCombined Uranium MR violation (Resolved).
EPA SDWIS · MR · Began Oct 1, 2024 · 1 year ago · Source ↗
Gross Alpha, Excl. Radon and U — MR violation
medium severityResolvedGross Alpha, Excl. Radon and U MR violation (Resolved).
EPA SDWIS · MR · Began Oct 1, 2024 · 1 year ago · Source ↗
Public Notice — Other violation
medium severityResolvedPublic Notice Other violation (Resolved).
EPA SDWIS · Other · Began Apr 28, 2024 · 2 years ago · Source ↗
Public Notice — Other violation
medium severityResolvedPublic Notice Other violation (Resolved).
EPA SDWIS · Other · Began Apr 28, 2024 · 2 years ago · Source ↗
Public Notice — Other violation
medium severityResolvedPublic Notice Other violation (Resolved).
EPA SDWIS · Other · Began May 18, 2023 · 3 years ago · Source ↗
Public Notice — Other violation
medium severityResolvedPublic Notice Other violation (Resolved).
EPA SDWIS · Other · Began May 18, 2023 · 3 years ago · Source ↗
Combined Uranium — MR violation
medium severityResolvedCombined Uranium MR violation (Resolved).
EPA SDWIS · MR · Began Jan 1, 2023 · 3 years ago · Source ↗
Gross Alpha, Excl. Radon and U — MR violation
medium severityResolvedGross 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 severityResolvedRevised Total Coliform Rule RPT violation (Resolved).
EPA SDWIS · RPT · Began Dec 1, 2022 · 3 years ago · Source ↗
Consumer Confidence Rule — Other violation
medium severityResolvedConsumer 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.