Community Water System · PWS AZ0414037

Cs Gadsden Water Company

Des Peres, Arizona 63131 - drinking water served from groundwater sources to 540 people, tracked in EPA SDWIS and UCMR5.

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

540
People served: 214
EPA violations: 4
Health-based: Untested
UCMR5 result

The verdict

EPA records 214 drinking-water violations at Cs Gadsden Water Company, 2% of them health-based - above the Arizona per-system average.

214
Total EPA violations on record: 2%
Health-based (MCL / treatment failure): 540
People served by this system: N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Cs Gadsden Water Company

Cs Gadsden Water Company is a private-owned community water system that delivers drinking water to 540 residents in Des Peres, Arizona (Yuma County) through 211 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 214 total violations for this system , of which 4 (2%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 153 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 Consumer Confidence Rule, recorded in 34 violations (Other). 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%).

Cs Gadsden Water Company's 214 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

540

Total Violations

214

Health-Based Violations

Water Source

Groundwater

System Details

System Type: Community
Owner Type: Private
Connections: 211
County: Yuma
School/Daycare: No
MCL Violations: 4
Monitoring Violations: 153
Treatment Tech Violations: 0

Violation History

Contaminant violations recorded by EPA.

Contaminant	Category	Count	Latest
Consumer Confidence Rule	Other	34	2021
Coliform (TCR)	MR	32	2016
Chlorine	MR	29	2008
Lead and Copper Rule	MR	13	2024
Revised Total Coliform Rule	RPT	11	2022
Nitrate	MR	9	2010
Total Haloacetic Acids (HAA5)	MR	7	2008
TTHM	MR	7	2008
Revised Total Coliform Rule	MON	6	2024
Coliform (TCR)	MCL	4	2009
o-Dichlorobenzene	MR	2	2001
1,1-Dichloroethylene	MR	2	2001
1,2-Dichloropropane	MR	2	2001
Tetrachloroethylene	MR	2	2001
Toluene	MR	2	2001
Ethylbenzene	MR	2	2001
Benzene	MR	2	2001
Gross Alpha, Excl. Radon and U	MR	2	1987
cis-1,2-Dichloroethylene	MR	2	2001
DICHLOROMETHANE	MR	2	2001
Styrene	MR	2	2001
1,1,2-Trichloroethane	MR	2	2001
Trichloroethylene	MR	2	2001
CHLOROBENZENE	MR	2	2001
1,2-Dichloroethane	MR	2	2001
trans-1,2-Dichloroethylene	MR	2	2001
1,1,1-Trichloroethane	MR	2	2001
Public Notice	Other	2	2021
Carbon tetrachloride	MR	2	2001
p-Dichlorobenzene	MR	2	2001

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 Cs Gadsden Water Company.

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 AZ0414037 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 Cs Gadsden Water Company 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	Lead and Copper Rule	MR	13	SDWIS / AZ0414037 / 5000
2024	Revised Total Coliform Rule	MON	6	SDWIS / AZ0414037 / 8000
2022	Revised Total Coliform Rule	RPT	11	SDWIS / AZ0414037 / 8000
2021	Consumer Confidence Rule	Other	34	SDWIS / AZ0414037 / 7000
2021	Public Notice	Other	2	SDWIS / AZ0414037 / 7500
2016	Coliform (TCR)	MR	32	SDWIS / AZ0414037 / 3100
2010	Nitrate	MR	9	SDWIS / AZ0414037 / 1040
2009	Coliform (TCR)	MCL	4	SDWIS / AZ0414037 / 3100
2008	Chlorine	MR	29	SDWIS / AZ0414037 / 0999
2008	Total Haloacetic Acids (HAA5)	MR	7	SDWIS / AZ0414037 / 2456
2008	TTHM	MR	7	SDWIS / AZ0414037 / 2950
2001	o-Dichlorobenzene	MR	2	SDWIS / AZ0414037 / 2968
2001	1,1-Dichloroethylene	MR	2	SDWIS / AZ0414037 / 2977
2001	1,2-Dichloropropane	MR	2	SDWIS / AZ0414037 / 2983
2001	Tetrachloroethylene	MR	2	SDWIS / AZ0414037 / 2987

How Cs Gadsden Water Company Compares

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

Metric	Cs Gadsden Water Company	Arizona avg	Federal benchmark
Total violations	214	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	None	95.4%	EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served	540	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 Cs Gadsden Water Company water safe to drink? ▼

Cs Gadsden Water Company (PWS ID: AZ0414037) has 214 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 540 people using Groundwater sources.

How many people does Cs Gadsden Water Company serve? ▼

Cs Gadsden Water Company serves 540 people in Des Peres, Arizona. It is a Private-owned system using Groundwater water sources with 211 service connections.

What type of violations does Cs Gadsden Water Company have? ▼

Cs Gadsden Water Company has 214 total violations: 4 health-based violations (MCL exceedances or treatment failures), 153 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.

Has PFAS been detected in Cs Gadsden Water Company water? ▼

No PFAS testing data is available for Cs Gadsden Water Company under the EPA's UCMR5 monitoring program.

What water source does Cs Gadsden Water Company use? ▼

Cs Gadsden Water Company 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.