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Community Water System · PWS AZ0402054

Northern Sunrise WC Mustang Crystal

Sierra Vista, Arizona 85635 - drinking water served from groundwater sources to 315 people, tracked in EPA SDWIS and UCMR5.

315
People served
467
EPA violations
2
Health-based
Untested
UCMR5 result

The verdict

EPA records 467 drinking-water violations at Northern Sunrise WC Mustang Crystal - above the Arizona per-system average.

467
Total EPA violations on record
0%
Health-based (MCL / treatment failure)
315
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Northern Sunrise WC Mustang Crystal

Northern Sunrise WC Mustang Crystal is a private-owned community water system that delivers drinking water to 315 residents in Sierra Vista, Arizona (Cochise County) through 137 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 467 total violations for this system , of which 2 (0%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 444 monitoring and reporting violations are on file. The most recent violation on record dates to 2022.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 52 violations (MR). This system has not yet been sampled under EPA's UCMR5 PFAS monitoring program, so no PFAS detection data is available here.

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%).

Northern Sunrise WC Mustang Crystal's 467 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
315
Total Violations
467
Health-Based Violations
2
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
137
County
Cochise
School/Daycare
No
MCL Violations
2
Monitoring Violations
444
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 52 2015
Nitrate MR 14 2008
Trichloroethylene MR 13 2012
Benzene MR 13 2012
Toluene MR 13 2012
Styrene MR 13 2012
cis-1,2-Dichloroethylene MR 13 2012
p-Dichlorobenzene MR 13 2012
1,2-Dichloroethane MR 13 2012
1,1,1-Trichloroethane MR 13 2012
Carbon tetrachloride MR 13 2012
1,2-Dichloropropane MR 13 2012
Tetrachloroethylene MR 13 2012
CHLOROBENZENE MR 13 2012
trans-1,2-Dichloroethylene MR 13 2012
1,1,2-Trichloroethane MR 13 2012
1,1-Dichloroethylene MR 13 2012
DICHLOROMETHANE MR 13 2012
o-Dichlorobenzene MR 13 2012
1,2,4-Trichlorobenzene MR 12 2012
Ethylbenzene MR 11 2012
Xylenes, Total MR 10 2012
Consumer Confidence Rule Other 9 2015
Vinyl chloride MR 8 2012
Gross Alpha, Excl. Radon and U MR 5 2010
BHC-GAMMA MR 3 1998
Toxaphene MR 3 1998
Endothall MR 3 1998
Glyphosate MR 3 1998
Simazine MR 3 1998

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 Northern Sunrise WC Mustang Crystal.

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 AZ0402054 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 Northern Sunrise WC Mustang Crystal 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
2022 Chlorine MR 3 SDWIS / AZ0402054 / 0999
2015 Coliform (TCR) MR 52 SDWIS / AZ0402054 / 3100
2015 Consumer Confidence Rule Other 9 SDWIS / AZ0402054 / 7000
2013 Lead and Copper Rule MR 3 SDWIS / AZ0402054 / 5000
2012 Trichloroethylene MR 13 SDWIS / AZ0402054 / 2984
2012 Benzene MR 13 SDWIS / AZ0402054 / 2990
2012 Toluene MR 13 SDWIS / AZ0402054 / 2991
2012 Styrene MR 13 SDWIS / AZ0402054 / 2996
2012 cis-1,2-Dichloroethylene MR 13 SDWIS / AZ0402054 / 2380
2012 p-Dichlorobenzene MR 13 SDWIS / AZ0402054 / 2969
2012 1,2-Dichloroethane MR 13 SDWIS / AZ0402054 / 2980
2012 1,1,1-Trichloroethane MR 13 SDWIS / AZ0402054 / 2981
2012 Carbon tetrachloride MR 13 SDWIS / AZ0402054 / 2982
2012 1,2-Dichloropropane MR 13 SDWIS / AZ0402054 / 2983
2012 Tetrachloroethylene MR 13 SDWIS / AZ0402054 / 2987

How Northern Sunrise WC Mustang Crystal Compares

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

Metric Northern Sunrise WC Mustang Crystal Arizona avg Federal benchmark
Total violations 467 153.3 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 2 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 315 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 Northern Sunrise WC Mustang Crystal water safe to drink? ▼
Northern Sunrise WC Mustang Crystal (PWS ID: AZ0402054) has 467 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 315 people using Groundwater sources.
How many people does Northern Sunrise WC Mustang Crystal serve? ▼
Northern Sunrise WC Mustang Crystal serves 315 people in Sierra Vista, Arizona. It is a Private-owned system using Groundwater water sources with 137 service connections.
What type of violations does Northern Sunrise WC Mustang Crystal have? ▼
Northern Sunrise WC Mustang Crystal has 467 total violations: 2 health-based violations (MCL exceedances or treatment failures), 444 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Northern Sunrise WC Mustang Crystal water? ▼
No PFAS testing data is available for Northern Sunrise WC Mustang Crystal under the EPA's UCMR5 monitoring program.
What water source does Northern Sunrise WC Mustang Crystal use? ▼
Northern Sunrise WC Mustang Crystal 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. 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.