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Community Water System · PWS AZ0402010

Bella Vista City Water System

Sierra Vista, Arizona 85635 - drinking water served from groundwater sources to 20,045 people, tracked in EPA SDWIS and UCMR5.

20,045
People served
1,564
EPA violations
4
Health-based
1 PFAS
UCMR5 result

The verdict

EPA records 1,564 drinking-water violations at Bella Vista City Water System - above the Arizona per-system average, and UCMR5 testing detected 1 PFAS compound.

1,564
Total EPA violations on record
0%
Health-based (MCL / treatment failure)
20,045
People served by this system
1
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Bella Vista City Water System

Bella Vista City Water System is a private-owned community water system that delivers drinking water to 20,045 residents in Sierra Vista, Arizona (Cochise County) through 8,018 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 1,564 total violations for this system , of which 4 (0%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 1,549 monitoring and reporting violations are on file. The most recent violation on record dates to 2023.

The most frequently cited contaminant at this system is HEXACHLOROBENZENE, recorded in 90 violations (MR). Under EPA's UCMR5 PFAS monitoring program, 1 PFAS compound was detected in samples collected from this system, with a maximum reported concentration of 3.5 ppt (parts per trillion). PFAS are persistent synthetic chemicals linked to health effects at very low exposure levels.

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%).

Bella Vista City Water System's 1,564 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.

PFAS Detected

1 PFAS "forever chemicals" detected in testing under EPA's UCMR5 monitoring program.

Population Served
20,045
Total Violations
1,564
Health-Based Violations
4
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
8,018
County
Cochise
School/Daycare
No
MCL Violations
4
Monitoring Violations
1,549
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
HEXACHLOROBENZENE MR 90 2004
Di(2-ethylhexyl) phthalate MR 87 2004
Endrin MR 77 2004
Endothall MR 76 2004
Toxaphene MR 65 2004
Picloram MR 64 2004
Pentachlorophenol MR 60 2007
Dinoseb MR 51 2004
Di(2-ethylhexyl) adipate MR 49 2004
1,2-DIBROMO-3-CHLOROPROPANE MR 42 2007
Heptachlor MR 41 2004
Hexachlorocyclopentadiene MR 41 2004
Simazine MR 40 2004
Chlordane MR 39 2004
Atrazine MR 39 2004
Benzo(a)pyrene MR 37 2004
LASSO MR 37 2004
BHC-GAMMA MR 37 2004
Methoxychlor MR 37 2004
Heptachlor epoxide MR 37 2004
ETHYLENE DIBROMIDE MR 30 2007
2,4-D MR 29 2007
Glyphosate MR 26 2004
Carbofuran MR 26 2007
Dalapon MR 26 2007
2,4,5-TP MR 26 2007
Diquat MR 25 2004
OXAMYL MR 24 2004
Nitrate MR 19 2013
2,3,7,8-TCDD MR 13 2004

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 2 of 870 samples detected PFAS.

Contaminant Date Result MRL Status
PFDoA 7/6/2023 <3.00 ppt 3.00 ppt Not Detected
PFDA 7/6/2023 <3.00 ppt 3.00 ppt Not Detected
PFOA 7/6/2023 <4.00 ppt 4.00 ppt Not Detected
PFOS 7/6/2023 <4.00 ppt 4.00 ppt Not Detected
PFNA 7/6/2023 <4.00 ppt 4.00 ppt Not Detected
PFHxS 7/6/2023 <3.00 ppt 3.00 ppt Not Detected
PFHpA 7/6/2023 <3.00 ppt 3.00 ppt Not Detected
PFBS 7/6/2023 <3.00 ppt 3.00 ppt Not Detected
NMeFOSAA 7/6/2023 <6.00 ppt 6.00 ppt Not Detected
PFTA 7/6/2023 <8.00 ppt 8.00 ppt Not Detected
PFTrDA 7/6/2023 <7.00 ppt 7.00 ppt Not Detected
NEtFOSAA 7/6/2023 <5.00 ppt 5.00 ppt Not Detected
NFDHA 7/6/2023 <20.00 ppt 20.00 ppt Not Detected
PFHxA 7/6/2023 <3.00 ppt 3.00 ppt Not Detected
PFMPA 7/6/2023 <4.00 ppt 4.00 ppt Not Detected
PFHpS 7/6/2023 <3.00 ppt 3.00 ppt Not Detected
PFPeS 7/6/2023 <4.00 ppt 4.00 ppt Not Detected
PFEESA 7/6/2023 <3.00 ppt 3.00 ppt Not Detected
PFMBA 7/6/2023 <3.00 ppt 3.00 ppt Not Detected
PFUnA 7/6/2023 <2.00 ppt 2.00 ppt Not Detected
PFPeA 7/6/2023 <3.00 ppt 3.00 ppt Not Detected
8:2 FTS 7/6/2023 <5.00 ppt 5.00 ppt Not Detected
4:2 FTS 7/6/2023 <3.00 ppt 3.00 ppt Not Detected
6:2 FTS 7/6/2023 <5.00 ppt 5.00 ppt Not Detected
PFBA 7/6/2023 <5.00 ppt 5.00 ppt Not Detected
HFPO-DA 7/6/2023 <5.00 ppt 5.00 ppt Not Detected
ADONA 7/6/2023 <3.00 ppt 3.00 ppt Not Detected
9Cl-PF3ONS 7/6/2023 <2.00 ppt 2.00 ppt Not Detected
11Cl-PF3OUdS 7/6/2023 <5.00 ppt 5.00 ppt Not Detected
NEtFOSAA 6/7/2023 <5.00 ppt 5.00 ppt Not Detected
PFEESA 6/7/2023 <3.00 ppt 3.00 ppt Not Detected
NFDHA 6/7/2023 <20.00 ppt 20.00 ppt Not Detected
PFPeS 6/7/2023 <4.00 ppt 4.00 ppt Not Detected
PFHpS 6/7/2023 <3.00 ppt 3.00 ppt Not Detected
PFTA 6/7/2023 <8.00 ppt 8.00 ppt Not Detected
PFHxA 6/7/2023 <3.00 ppt 3.00 ppt Not Detected
NMeFOSAA 6/7/2023 <6.00 ppt 6.00 ppt Not Detected
PFMBA 6/7/2023 <3.00 ppt 3.00 ppt Not Detected
PFTrDA 6/7/2023 <7.00 ppt 7.00 ppt Not Detected
PFOS 6/7/2023 <4.00 ppt 4.00 ppt Not Detected
PFBS 6/7/2023 <3.00 ppt 3.00 ppt Not Detected
PFHpA 6/7/2023 <3.00 ppt 3.00 ppt Not Detected
11Cl-PF3OUdS 6/7/2023 <5.00 ppt 5.00 ppt Not Detected
PFNA 6/7/2023 <4.00 ppt 4.00 ppt Not Detected
PFPeA 6/7/2023 <3.00 ppt 3.00 ppt Not Detected
PFOA 6/7/2023 <4.00 ppt 4.00 ppt Not Detected
PFDA 6/7/2023 <3.00 ppt 3.00 ppt Not Detected
PFDoA 6/7/2023 <3.00 ppt 3.00 ppt Not Detected
PFMPA 6/7/2023 <4.00 ppt 4.00 ppt Not Detected
9Cl-PF3ONS 6/7/2023 <2.00 ppt 2.00 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 Bella Vista City Water System.

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 AZ0402010 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 Bella Vista City Water System 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
2023 Lead and Copper Rule MR 4 SDWIS / AZ0402010 / 5000
2022 Chlorine MR 2 SDWIS / AZ0402010 / 0999
2015 Consumer Confidence Rule Other 7 SDWIS / AZ0402010 / 7000
2014 Coliform (TCR) MR 13 SDWIS / AZ0402010 / 3100
2013 Nitrate MR 19 SDWIS / AZ0402010 / 1040
2009 1,2,4-Trichlorobenzene MR 6 SDWIS / AZ0402010 / 2378
2009 cis-1,2-Dichloroethylene MR 6 SDWIS / AZ0402010 / 2380
2009 Xylenes, Total MR 6 SDWIS / AZ0402010 / 2955
2009 p-Dichlorobenzene MR 6 SDWIS / AZ0402010 / 2969
2009 1,1-Dichloroethylene MR 6 SDWIS / AZ0402010 / 2977
2009 trans-1,2-Dichloroethylene MR 6 SDWIS / AZ0402010 / 2979
2009 1,2-Dichloroethane MR 6 SDWIS / AZ0402010 / 2980
2009 1,1,1-Trichloroethane MR 6 SDWIS / AZ0402010 / 2981
2009 Carbon tetrachloride MR 6 SDWIS / AZ0402010 / 2982
2009 1,2-Dichloropropane MR 6 SDWIS / AZ0402010 / 2983

How Bella Vista City Water System Compares

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

Metric Bella Vista City Water System Arizona avg Federal benchmark
Total violations 1,564 153.3 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 4 10.5 Indicates a contaminant exceeded a federal MCL
PFAS detection 1 compound 95.4% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 20,045 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 Bella Vista City Water System water safe to drink? ▼
Bella Vista City Water System (PWS ID: AZ0402010) has 1564 recorded violations in the EPA SDWIS database. PFAS contamination has been detected in UCMR5 testing, with 1 PFAS compound found. This system serves 20,045 people using Groundwater sources.
How many people does Bella Vista City Water System serve? ▼
Bella Vista City Water System serves 20,045 people in Sierra Vista, Arizona. It is a Private-owned system using Groundwater water sources with 8,018 service connections.
What type of violations does Bella Vista City Water System have? ▼
Bella Vista City Water System has 1,564 total violations: 4 health-based violations (MCL exceedances or treatment failures), 1,549 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Bella Vista City Water System water? ▼
Yes. UCMR5 testing detected 1 PFAS compound in Bella Vista City Water System's water supply: PFPeA. PFAS are persistent "forever chemicals" that do not break down in the environment.
What water source does Bella Vista City Water System use? ▼
Bella Vista City Water System 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.

Read our methodology - how this data is sourced, computed, and verified.

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.