Mustang Water Authority☆

Where the water comes from

Facility	Kind	Water
CC DITCH	Intake	Surface water
SAN MIGUEL RIVER	Intake	Surface water

These are EPA's facility records, not DWR structures. Which decreed rights sit behind an intake is the next phase; nothing here is inferred.

Wholesale connections

Sells water to 2 systems: NATURITA TOWN OF, NUCLA TOWN OF.

DWR structures that name this system

Source Probable join · fetched 2026-09-09 · matched on DWR's recorded contact or an EPA intake name; verify on the dossier

No DWR structure on file records this system as its contact, and none of its EPA intakes matches a structure name in its districts. DWR records a contact on only a fraction of structures, and only for districts fetched from its live service, so this is absence of a record, not evidence of no rights.

Compliance record

Source Register of another agency · fetched 2026-09-09 · verify at EPA ECHO ↗

EPA's own summary: violations in 7 of the last 12 quarters, significant non-compliance in 1. In violation for, in EPA's words: 0200=Surface Water Treatment Rule; 0300=Interim Enhanced Surface Water Treatment Rule; 1005=Arsenic; 1010=Barium; 1015=Cadmium; 1020=Chromium; 1025=Fluoride; 1035=Mercury; 1036=Nickel; 1040=Nitrate; 1045=Selenium; 1074=Antimony, Total; 1075=Beryllium, Total; 1085=Thallium, Total; 2378=1,2,4-Trichlorobenzene; 2380=cis-1,2-Dichloroethylene; 2955=Xylenes, Total; 2964=DICHLOROMETHANE; 2968=o-Dichlorobenzene; 2969=p-Dichlorobenzene; 2976=Vinyl chloride; 2977=1,1-Dichloroethylene; 2979=trans-1,2-Dichloroethylene; 2980=1,2-Dichloroethane; 2981=1,1,1-Trichloroethane; 2982=Carbon tetrachloride; 2983=1,2-Dichloropropane; 2984=Trichloroethylene; 2985=1,1,2-Trichloroethane; 2987=Tetrachloroethylene; 2989=CHLOROBENZENE; 2990=Benzene; 2991=Toluene; 2992=Ethylbenzene; 2996=Styrene.

What happened

All 6 violation records on file, grouped into the 4 distinct things EPA's codes describe. Dates are the compliance period the violation is filed against.

Every violation record, as filed (6 of 6)

Compliance period	What	About	Kind	Status	Measured
2023-09-01 – 2023-09-30	Treatment Technique (SWTR and GWR)	SWTR	health-based	returned to compliance (2023-09-06)
2023-08-01 – 2023-08-31	Treatment Technique (SWTR and GWR)	SWTR	health-based	returned to compliance (2023-09-06)
2023-08-01 – 2023-08-31	Monthly Turbidity Exceed (Enhanced SWTR)	Ieswtr	health-based	returned to compliance (2023-10-10)
2023-05-01 – 2023-05-31	Monthly Turbidity Exceed (Enhanced SWTR)	Ieswtr	health-based	returned to compliance (2023-10-10)
2023-05-01 – 2023-05-31	Single Turbidity Exceed (Enhanced SWTR)	Ieswtr	health-based	returned to compliance (2023-10-10)
2019-01-07	Treatment Technique No Certif. Operator	DBP Stage 1	health-based	returned to compliance (2019-01-14)

What the regulator did about it

66 enforcement actions on this system's federal record. In Colorado the state is the primacy agency, so most actions are the state's; EPA acts directly on tribal systems and when it steps in.

20 most recent of 66; the rest are on the ECHO report.

No lead or copper 90th-percentile result on the federal record for this system.

Violation, enforcement and lead/copper records are EPA SDWIS federal reporting, fetched monthly; the summary is EPA ECHO. Code names come from EPA's own REF_CODE_VALUE table. SDWIS carries violations, not routine sample results — nitrate, disinfection by-product and PFAS values are not in it, and a clean record here means nothing was reported as a violation, not that nothing was ever detected. For what was measured, ask the system for its Consumer Confidence Report.

PFAS and lithium: EPA's UCMR 5 monitoring, 2023–2025

Source Register of another agency · fetched 2026-09-09 · verify at EPA UCMR occurrence data ↗

EPA did not sample this system under UCMR 5 (the rule covered every system serving more than 3,300 people and a drawn sample of smaller ones).

Common questions

Who provides drinking water in Nucla, Colorado?

Mustang Water Authority is the public water system in Montrose County, from surface water. Its EPA public water system id is CO0143525.

Where does Mustang Water Authority get its water?

Mustang Water Authority reports surface water as its primary source. EPA lists its source facilities as CC DITCH, SAN MIGUEL RIVER.

Does Mustang Water Authority have any drinking water violations?

EPA's compliance record shows no open health-based violations for Mustang Water Authority at the last monthly fetch. Older and non-health-based entries, if any, are listed on this page.