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Tap water quality report

Casas Arroyo Association Inc

EPA monitoring tested this supplier for 71 contaminants and detected 10. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

71
contaminants tested
10
detected
27
people served
10
health-based violations
Arizona rankingsLead in ArizonaPFAS in Arizona
Water source
Ground water
Ownership
Private
Counties served
Santa Cruz

Compliance record

Formal violations the EPA has on file for this supplier. A health-based violation means a contaminant limit or a required treatment was breached; the rest are monitoring or reporting failures — still violations, but not a measured health risk.

10
health-based violations
120
violations on file
0
still open
ViolationTypeStatusPeriod
TT Health-based Resolved 2025-03-23
TT Health-based Resolved 2025-03-23
TT Health-based Resolved 2025-03-23
TT Health-based Resolved 2025-03-23
TT Health-based Resolved 2025-03-23
TT Health-based Resolved 2024-10-17
TT Health-based Resolved 2024-10-17
TT Health-based Resolved 2024-10-17
TT Health-based Resolved 2024-10-17
MCL Health-based Resolved 1999-09-01 → 1999-09-30

Other contaminants detected

Each bar shows the measured level as a share of the EPA limit: green is well under, amber is close to it, red is over. For lead and copper the limit applies to exactly the 90th-percentile figure shown, so red there means a real exceedance. For everything else the limit applies to a running annual average while the figure is the single worst sample on record — over 100% is worth reading, but is not by itself a violation. Formal violations are listed separately.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
Nitrate
2200 µg/L 22%
of the EPA limit 10000 µg/L
 16/16 SYR4 2012–2019
Copper
230 µg/L 18%
of the EPA limit 1300 µg/L
 15/15 SYR4 2012–2018
Lead
0.0010 mg/L 6.7%
of the EPA limit 0.0150 mg/L
 9/9 LCR 2024
Lead
2.9 µg/L 19%
of the EPA limit 15 µg/L
 9/15 SYR4 2012–2018
TTHM
3.7 µg/L 4.6%
of the EPA limit 80 µg/L
 5/6 SYR4 2012–2018
Arsenic
3 µg/L 30%
of the EPA limit 10 µg/L
 1/1 SYR4 2012
Barium
280 µg/L 14%
of the EPA limit 2000 µg/L
 1/1 SYR4 2012
Combined Radium (-226 And -228)
0.8000 pCi/L 16%
of the EPA limit 5 pCi/L
 1/1 SYR4 2015
Fluoride
190 µg/L 4.8%
of the EPA limit 4000 µg/L
 1/1 SYR4 2012
Nitrate-Nitrite
2200 µg/L 22%
of the EPA limit 10000 µg/L
 1/1 SYR4 2012
61 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane2,3,7,8-TCDD2,4,5-TP2,4-DAntimony, TotalAsbestosAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorNitriteOxamylPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Haloacetic Acids (HAA5)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
POWELL, ERIK
Phone
520-444-0410
Email
erikpowell@aol.com

Frequently asked questions about Casas Arroyo Association Inc

Is Casas Arroyo Association Inc tap water safe to drink?

EPA monitoring detected 10 contaminants in Casas Arroyo Association Inc's water. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and the utility's annual Consumer Confidence Report for its official compliance status.

What contaminants were detected in Casas Arroyo Association Inc's water?

EPA monitoring detected Nitrate, Copper, Lead, Lead, TTHM, and others. The full list with the level and data source for each is above.

How many people does Casas Arroyo Association Inc serve?

Casas Arroyo Association Inc reports serving 27 people in Arizona, per its EPA record.

Has Casas Arroyo Association Inc had any water quality violations?

The EPA has 120 violations on file for Casas Arroyo Association Inc, of which 10 are health-based (a contaminant limit or required treatment was breached) and 0 remain open. The rest are monitoring or reporting failures.

Where does this data come from?

Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.