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Community Water System · PWS AZ0409016

Joseph City Dwid

Joseph City, Arizona 86032 - drinking water served from groundwater sources to 1,811 people, tracked in EPA SDWIS and UCMR5.

1,811
People served
318
EPA violations
0
Health-based
Untested
UCMR5 result

The verdict

EPA records 318 drinking-water violations at Joseph City Dwid - above the Arizona per-system average.

318
Total EPA violations on record
0%
Health-based (MCL / treatment failure)
1,811
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Joseph City Dwid

Joseph City Dwid is a private-owned community water system that delivers drinking water to 1,811 residents in Joseph City, Arizona (Navajo County) through 465 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 318 total violations for this system , of which 0 (0%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 244 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 71 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%).

Joseph City Dwid's 318 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
1,811
Total Violations
318
Health-Based Violations
0
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
465
County
Navajo
School/Daycare
No
MCL Violations
0
Monitoring Violations
244
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Chlorine MR 71 2024
Lead and Copper Rule MR 40 2019
Consumer Confidence Rule Other 35 2021
TTHM MR 22 2023
Total Haloacetic Acids (HAA5) MR 22 2023
Nitrate MR 21 2017
Coliform (TCR) MR 7 2015
Revised Total Coliform Rule MON 6 2017
Revised Total Coliform Rule RPT 3 2018
Mercury MR 3 2002
Fluoride MR 3 2002
Asbestos MR 2 2002
Xylenes, Total MR 2 1998
DICHLOROMETHANE MR 2 1998
p-Dichlorobenzene MR 2 1998
1,1,1-Trichloroethane MR 2 1998
Carbon tetrachloride MR 2 1998
1,2-Dichloropropane MR 2 1998
Trichloroethylene MR 2 1998
1,1,2-Trichloroethane MR 2 1998
Tetrachloroethylene MR 2 1998
Benzene MR 2 1998
Toluene MR 2 1998
Ethylbenzene MR 2 1998
1,2,4-Trichlorobenzene MR 2 1998
cis-1,2-Dichloroethylene MR 2 1998
o-Dichlorobenzene MR 2 1998
1,1-Dichloroethylene MR 2 1998
trans-1,2-Dichloroethylene MR 2 1998
Styrene MR 2 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 Joseph City Dwid.

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 AZ0409016 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 Joseph City Dwid 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 Chlorine MR 71 SDWIS / AZ0409016 / 0999
2023 TTHM MR 22 SDWIS / AZ0409016 / 2950
2023 Total Haloacetic Acids (HAA5) MR 22 SDWIS / AZ0409016 / 2456
2021 Consumer Confidence Rule Other 35 SDWIS / AZ0409016 / 7000
2019 Lead and Copper Rule MR 40 SDWIS / AZ0409016 / 5000
2018 Revised Total Coliform Rule RPT 3 SDWIS / AZ0409016 / 8000
2017 Nitrate MR 21 SDWIS / AZ0409016 / 1040
2017 Revised Total Coliform Rule MON 6 SDWIS / AZ0409016 / 8000
2015 Coliform (TCR) MR 7 SDWIS / AZ0409016 / 3100
2002 Mercury MR 3 SDWIS / AZ0409016 / 1035
2002 Fluoride MR 3 SDWIS / AZ0409016 / 1025
2002 Asbestos MR 2 SDWIS / AZ0409016 / 1094
1998 Xylenes, Total MR 2 SDWIS / AZ0409016 / 2955
1998 DICHLOROMETHANE MR 2 SDWIS / AZ0409016 / 2964
1998 p-Dichlorobenzene MR 2 SDWIS / AZ0409016 / 2969

How Joseph City Dwid Compares

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

Metric Joseph City Dwid Arizona avg Federal benchmark
Total violations 318 153.3 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 0 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 1,811 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 Joseph City Dwid water safe to drink? ▼
Joseph City Dwid (PWS ID: AZ0409016) has 318 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 1,811 people using Groundwater sources.
How many people does Joseph City Dwid serve? ▼
Joseph City Dwid serves 1,811 people in Joseph City, Arizona. It is a Private-owned system using Groundwater water sources with 465 service connections.
What type of violations does Joseph City Dwid have? ▼
Joseph City Dwid has 318 total violations: 0 health-based violations (MCL exceedances or treatment failures), 244 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Joseph City Dwid water? ▼
No PFAS testing data is available for Joseph City Dwid under the EPA's UCMR5 monitoring program.
What water source does Joseph City Dwid use? ▼
Joseph City Dwid 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.