PlainWater

Community Water System · PWS AZ0414015

Somerton City Of

Somerton, Arizona 85350 - drinking water served from groundwater sources to 14,197 people, tracked in EPA SDWIS and UCMR5.

14,197
People served
190
EPA violations
1
Health-based
No PFAS
UCMR5 result

The verdict

EPA records 190 drinking-water violations at Somerton City Of, 1% of them health-based - above the Arizona per-system average.

190
Total EPA violations on record
1%
Health-based (MCL / treatment failure)
14,197
People served by this system
0
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Somerton City Of

Somerton City Of is a local-owned community water system that delivers drinking water to 14,197 residents in Somerton, Arizona (Yuma County) through 3,624 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 190 total violations for this system , of which 1 (1%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 152 monitoring and reporting violations are on file. The most recent violation on record dates to 2024.

The most frequently cited contaminant at this system is Chlorine, recorded in 16 violations (MR). This system was sampled under EPA's UCMR5 PFAS monitoring program and no PFAS compounds were detected above the minimum reporting level.

Across Arizona, EPA tracks 1,493 public water systems serving 7,322,166 people, with 228,944 cumulative violations and 15,663 health-based violations on record. About 98% of systems in the state carry at least one violation, and state-wide the average per system is 153.3 violations. Statewide, 145 of 152 UCMR5-tested systems have reported PFAS detections (95.4%).

Somerton City Of's 190 violations sit above the Arizona average.

All figures above are sourced directly from EPA SDWIS and UCMR5 public data releases and are updated as EPA publishes new reporting cycles.

Population Served
14,197
Total Violations
190
Health-Based Violations
1
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
3,624
County
Yuma
School/Daycare
No
MCL Violations
1
Monitoring Violations
152
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Chlorine MR 16 2023
Revised Total Coliform Rule RPT 12 2024
Consumer Confidence Rule Other 8 2019
TTHM MR 7 2020
Coliform (TCR) MR 6 2004
Total Haloacetic Acids (HAA5) MR 5 2020
Revised Total Coliform Rule MON 4 2016
BHC-GAMMA MR 3 2004
Methoxychlor MR 3 2004
Toxaphene MR 3 2004
Dalapon MR 3 2004
Diquat MR 3 2004
OXAMYL MR 3 2004
Simazine MR 3 2004
Dinoseb MR 3 2004
Hexachlorocyclopentadiene MR 3 2004
Carbofuran MR 3 2004
Atrazine MR 3 2004
LASSO MR 3 2004
Heptachlor MR 3 2004
2,4-D MR 3 2004
2,4,5-TP MR 3 2004
HEXACHLOROBENZENE MR 3 2004
Chlordane MR 3 2004
Endrin MR 3 2004
Di(2-ethylhexyl) adipate MR 3 2004
Di(2-ethylhexyl) phthalate MR 3 2004
Picloram MR 3 2004
Endothall MR 3 2004
1,2-DIBROMO-3-CHLOROPROPANE MR 3 2004

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 0 of 58 samples detected PFAS.

Contaminant Date Result MRL Status
11Cl-PF3OUdS 9/11/2023 <5.00 ppt 5.00 ppt Not Detected
NFDHA 9/11/2023 <20.00 ppt 20.00 ppt Not Detected
PFHpS 9/11/2023 <3.00 ppt 3.00 ppt Not Detected
PFPeS 9/11/2023 <4.00 ppt 4.00 ppt Not Detected
PFHxA 9/11/2023 <3.00 ppt 3.00 ppt Not Detected
PFTA 9/11/2023 <8.00 ppt 8.00 ppt Not Detected
PFTrDA 9/11/2023 <7.00 ppt 7.00 ppt Not Detected
NEtFOSAA 9/11/2023 <5.00 ppt 5.00 ppt Not Detected
NMeFOSAA 9/11/2023 <6.00 ppt 6.00 ppt Not Detected
PFBS 9/11/2023 <3.00 ppt 3.00 ppt Not Detected
PFHpA 9/11/2023 <3.00 ppt 3.00 ppt Not Detected
PFHxS 9/11/2023 <3.00 ppt 3.00 ppt Not Detected
PFNA 9/11/2023 <4.00 ppt 4.00 ppt Not Detected
PFOS 9/11/2023 <4.00 ppt 4.00 ppt Not Detected
PFOA 9/11/2023 <4.00 ppt 4.00 ppt Not Detected
ADONA 9/11/2023 <3.00 ppt 3.00 ppt Not Detected
PFDoA 9/11/2023 <3.00 ppt 3.00 ppt Not Detected
PFEESA 9/11/2023 <3.00 ppt 3.00 ppt Not Detected
PFUnA 9/11/2023 <2.00 ppt 2.00 ppt Not Detected
9Cl-PF3ONS 9/11/2023 <2.00 ppt 2.00 ppt Not Detected
HFPO-DA 9/11/2023 <5.00 ppt 5.00 ppt Not Detected
PFBA 9/11/2023 <5.00 ppt 5.00 ppt Not Detected
6:2 FTS 9/11/2023 <5.00 ppt 5.00 ppt Not Detected
4:2 FTS 9/11/2023 <3.00 ppt 3.00 ppt Not Detected
8:2 FTS 9/11/2023 <5.00 ppt 5.00 ppt Not Detected
PFMPA 9/11/2023 <4.00 ppt 4.00 ppt Not Detected
PFPeA 9/11/2023 <3.00 ppt 3.00 ppt Not Detected
PFMBA 9/11/2023 <3.00 ppt 3.00 ppt Not Detected
PFDA 9/11/2023 <3.00 ppt 3.00 ppt Not Detected
PFOA 2/13/2024 <4.00 ppt 4.00 ppt Not Detected
PFPeS 2/13/2024 <4.00 ppt 4.00 ppt Not Detected
PFHpS 2/13/2024 <3.00 ppt 3.00 ppt Not Detected
PFEESA 2/13/2024 <3.00 ppt 3.00 ppt Not Detected
PFTA 2/13/2024 <8.00 ppt 8.00 ppt Not Detected
PFTrDA 2/13/2024 <7.00 ppt 7.00 ppt Not Detected
NEtFOSAA 2/13/2024 <5.00 ppt 5.00 ppt Not Detected
NMeFOSAA 2/13/2024 <6.00 ppt 6.00 ppt Not Detected
PFDoA 2/13/2024 <3.00 ppt 3.00 ppt Not Detected
PFMBA 2/13/2024 <3.00 ppt 3.00 ppt Not Detected
NFDHA 2/13/2024 <20.00 ppt 20.00 ppt Not Detected
PFBS 2/13/2024 <3.00 ppt 3.00 ppt Not Detected
PFHpA 2/13/2024 <3.00 ppt 3.00 ppt Not Detected
PFHxS 2/13/2024 <3.00 ppt 3.00 ppt Not Detected
PFNA 2/13/2024 <4.00 ppt 4.00 ppt Not Detected
PFOS 2/13/2024 <4.00 ppt 4.00 ppt Not Detected
PFDA 2/13/2024 <3.00 ppt 3.00 ppt Not Detected
PFBA 2/13/2024 <5.00 ppt 5.00 ppt Not Detected
PFPeA 2/13/2024 <3.00 ppt 3.00 ppt Not Detected
PFMPA 2/13/2024 <4.00 ppt 4.00 ppt Not Detected
8:2 FTS 2/13/2024 <5.00 ppt 5.00 ppt Not Detected

Verify This Water System

The figures above are aggregated from EPA's public databases. To verify the underlying records, or to file a complaint, request a Consumer Confidence Report, or check current monitoring status, go directly to the federal and state regulators that enforce the Safe Drinking Water Act for Somerton City Of.

Federal Source of Truth

EPA SDWIS, Federal Reports

EPA's Safe Drinking Water Information System (SDWIS) holds the federal compliance record for every regulated public water system. Open the system-level report by PWS ID:

View PWS ID AZ0414015 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

Arizona Drinking Water Authority

Arizona DEQ, Drinking Water Program is the primacy agency that licenses and inspects Somerton City Of under EPA-delegated authority.

Open AZ regulator portal

Source: Arizona DEQ, Drinking Water Program

Violation Timeline

Each row links to the EPA SDWIS public record for verification. Cross-reference the contaminant code on EPA's federal report to see violation dates, return-to-compliance status, and enforcement actions.

Year (latest) Contaminant Category Count EPA Record
2024 Revised Total Coliform Rule RPT 12 SDWIS / AZ0414015 / 8000
2023 Chlorine MR 16 SDWIS / AZ0414015 / 0999
2020 TTHM MR 7 SDWIS / AZ0414015 / 2950
2020 Total Haloacetic Acids (HAA5) MR 5 SDWIS / AZ0414015 / 2456
2019 Consumer Confidence Rule Other 8 SDWIS / AZ0414015 / 7000
2016 Revised Total Coliform Rule MON 4 SDWIS / AZ0414015 / 8000
2011 E. COLI MR 1 SDWIS / AZ0414015 / 3014
2010 TTHM MCL 1 SDWIS / AZ0414015 / 2950
2004 Coliform (TCR) MR 6 SDWIS / AZ0414015 / 3100
2004 BHC-GAMMA MR 3 SDWIS / AZ0414015 / 2010
2004 Methoxychlor MR 3 SDWIS / AZ0414015 / 2015
2004 Toxaphene MR 3 SDWIS / AZ0414015 / 2020
2004 Dalapon MR 3 SDWIS / AZ0414015 / 2031
2004 Diquat MR 3 SDWIS / AZ0414015 / 2032
2004 OXAMYL MR 3 SDWIS / AZ0414015 / 2036

How Somerton City Of Compares

Cross-reference this system's record against state averages and the federal MCL framework for context.

Metric Somerton City Of Arizona avg Federal benchmark
Total violations 190 153.3 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 1 10.5 Indicates a contaminant exceeded a federal MCL
PFAS detection None 95.4% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 14,197 4,904 Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 1,493 regulated public water systems in Arizona.

Federal MCL reference, Safe Drinking Water Act thresholds
Contaminant Federal MCL / Action Level Note
Lead 0 mg/L (Action Level: 0.015 mg/L) Lead and Copper Rule treatment technique
Arsenic 0.010 mg/L (10 ppb) Health-based MCL since 2006
Total Coliform Treatment technique (RTCR) Indicator organism, monitoring trigger
PFOA / PFOS (PFAS) 4.0 ppt each (final 2024 rule) Compliance deadline 2029 (EPA proposed extending to 2031, not yet final as of May 2026)
Nitrate (as N) 10 mg/L Acute health risk for infants

Frequently Asked Questions

Is Somerton City Of water safe to drink?
Somerton City Of (PWS ID: AZ0414015) has 190 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 14,197 people using Groundwater sources.
How many people does Somerton City Of serve?
Somerton City Of serves 14,197 people in Somerton, Arizona. It is a Local-owned system using Groundwater water sources with 3,624 service connections.
What type of violations does Somerton City Of have?
Somerton City Of has 190 total violations: 1 health-based violations (MCL exceedances or treatment failures), 152 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Somerton City Of water?
No. Somerton City Of was tested for PFAS under the EPA's UCMR5 monitoring program and no PFAS contamination was detected.
What water source does Somerton City Of use?
Somerton City Of uses Groundwater as its primary water source. It is classified as a Community Water System (CWS), serving residential populations year-round.
Where does this data come from?
All data comes from the EPA Safe Drinking Water Information System (SDWIS) and the UCMR5 PFAS monitoring program. SDWIS tracks compliance for all public water systems regulated under the Safe Drinking Water Act.
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025. PFAS data from EPA UCMR5 monitoring program (2023-2025). This data is provided for informational purposes only.
Data sourced from EPA SDWIS and UCMR5 PFAS monitoring data. See our methodology for details. Retrieved and formatted by PlainWater Editorial

Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. This system's figures are rendered directly from EPA SDWIS data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.