Non-Transient Non-Community Water System · PWS AZ0408703

Nps Temple Bar WTP

Boulder City, Arizona 89005 - drinking water served from groundwater sources to 305 people, tracked in EPA SDWIS and UCMR5.

Compiled by PlainWater Editorial, Drinking Water Quality Editorial Team · May 15, 2026

305
People served: 403
EPA violations: 1
Health-based: Untested
UCMR5 result

The verdict

EPA records 403 drinking-water violations at Nps Temple Bar WTP - above the Arizona per-system average.

403
Total EPA violations on record: 0%
Health-based (MCL / treatment failure): 305
People served by this system: N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Nps Temple Bar WTP

Nps Temple Bar WTP is a federal-owned non-transient non-community water system that delivers drinking water to 305 residents in Boulder City, Arizona (Mohave County) through 14 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 403 total violations for this system , of which 1 (0%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 374 monitoring and reporting violations are on file. The most recent violation on record dates to 2025.

The most frequently cited contaminant at this system is Chlorine, recorded in 54 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%).

Nps Temple Bar WTP's 403 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

305

Total Violations

403

Health-Based Violations

Water Source

Groundwater

System Details

System Type: Non-Transient Non-Community
Owner Type: Federal
Connections: 14
County: Mohave
School/Daycare: No
MCL Violations: 1
Monitoring Violations: 374
Treatment Tech Violations: 0

Violation History

Contaminant violations recorded by EPA.

Contaminant	Category	Count	Latest
Chlorine	MR	54	2024
Nitrate	MR	29	2020
TTHM	MR	14	2023
Total Haloacetic Acids (HAA5)	MR	14	2023
Arsenic	MR	14	2025
Lead and Copper Rule	MR	13	2024
Consumer Confidence Rule	Other	10	2017
Gross Alpha, Excl. Radon and U	MR	7	2013
Revised Total Coliform Rule	RPT	6	2024
o-Dichlorobenzene	MR	5	2004
p-Dichlorobenzene	MR	5	2004
Carbon tetrachloride	MR	5	2004
trans-1,2-Dichloroethylene	MR	5	2004
1,2-Dichloroethane	MR	5	2004
1,1,1-Trichloroethane	MR	5	2004
Toluene	MR	5	2004
Styrene	MR	5	2004
1,1-Dichloroethylene	MR	5	2004
1,1,2-Trichloroethane	MR	5	2004
Tetrachloroethylene	MR	5	2004
CHLOROBENZENE	MR	5	2004
Benzene	MR	5	2004
Combined Uranium	MR	5	2013
Radium-226	MR	5	2013
Combined Radium (-226 and -228)	MR	5	2013
Radium-228	MR	5	2013
1,2,4-Trichlorobenzene	MR	5	2004
cis-1,2-Dichloroethylene	MR	5	2004
1,2-Dichloropropane	MR	5	2004
Trichloroethylene	MR	5	2004

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 Nps Temple Bar WTP.

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 AZ0408703 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 Nps Temple Bar WTP 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
2025	Arsenic	MR	14	SDWIS / AZ0408703 / 1005
2024	Chlorine	MR	54	SDWIS / AZ0408703 / 0999
2024	Lead and Copper Rule	MR	13	SDWIS / AZ0408703 / 5000
2024	Revised Total Coliform Rule	RPT	6	SDWIS / AZ0408703 / 8000
2023	TTHM	MR	14	SDWIS / AZ0408703 / 2950
2023	Total Haloacetic Acids (HAA5)	MR	14	SDWIS / AZ0408703 / 2456
2020	Nitrate	MR	29	SDWIS / AZ0408703 / 1040
2017	Consumer Confidence Rule	Other	10	SDWIS / AZ0408703 / 7000
2013	Gross Alpha, Excl. Radon and U	MR	7	SDWIS / AZ0408703 / 4000
2013	Combined Uranium	MR	5	SDWIS / AZ0408703 / 4006
2013	Radium-226	MR	5	SDWIS / AZ0408703 / 4020
2013	Combined Radium (-226 and -228)	MR	5	SDWIS / AZ0408703 / 4010
2013	Radium-228	MR	5	SDWIS / AZ0408703 / 4030
2007	Coliform (TCR)	MR	4	SDWIS / AZ0408703 / 3100
2004	o-Dichlorobenzene	MR	5	SDWIS / AZ0408703 / 2968

How Nps Temple Bar WTP Compares

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

Metric	Nps Temple Bar WTP	Arizona avg	Federal benchmark
Total violations	403	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	305	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 Nps Temple Bar WTP water safe to drink? ▼

Nps Temple Bar WTP (PWS ID: AZ0408703) has 403 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 305 people using Groundwater sources.

How many people does Nps Temple Bar WTP serve? ▼

Nps Temple Bar WTP serves 305 people in Boulder City, Arizona. It is a Federal-owned system using Groundwater water sources with 14 service connections.

What type of violations does Nps Temple Bar WTP have? ▼

Nps Temple Bar WTP has 403 total violations: 1 health-based violations (MCL exceedances or treatment failures), 374 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.

Has PFAS been detected in Nps Temple Bar WTP water? ▼

No PFAS testing data is available for Nps Temple Bar WTP under the EPA's UCMR5 monitoring program.

What water source does Nps Temple Bar WTP use? ▼

Nps Temple Bar WTP uses Groundwater as its primary water source. It is classified as a Non-Transient Non-Community Water System, serving the same people for at least 6 months per year.

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.