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Gw Ocotillo Water - Silverbell West

EPA monitoring tested this supplier for 71 contaminants and detected 12. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

71
contaminants tested
12
detected
263
people served
0
health-based violations
Arizona rankingsLead in ArizonaPFAS in Arizona
Water source
Ground water
Ownership
Local government
Counties served
Pima

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.

0
health-based violations
107
violations on file
0
still open
ViolationTypeStatusPeriod
MR Monitoring Resolved 2019-01-01 → 2021-12-31
MR Monitoring Resolved 2019-01-01 → 2021-12-31
MR Monitoring Resolved 2019-01-01 → 2021-12-31
MR Monitoring Resolved 2019-01-01 → 2021-12-31
MR Monitoring Resolved 2019-01-01 → 2021-12-31
MR Monitoring Resolved 2019-01-01 → 2021-12-31
MR Monitoring Resolved 2019-01-01 → 2021-12-31
MR Monitoring Resolved 2019-01-01 → 2021-12-31
MR Monitoring Resolved 2019-01-01 → 2021-12-31
MR Monitoring Resolved 2019-01-01 → 2021-12-31

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
5000 µg/L 50%
of the EPA limit 10000 µg/L
 32/32 SYR4 2012–2019
Copper
95.1 µg/L 7.3%
of the EPA limit 1300 µg/L
 15/15 SYR4 2013–2019
Lead
4.96 µg/L 33%
of the EPA limit 15 µg/L
 15/15 SYR4 2013–2019
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
 6/6 LCR 2025
Arsenic
6 µg/L 60%
of the EPA limit 10 µg/L
 3/3 SYR4 2013–2019
Barium
88 µg/L 4.4%
of the EPA limit 2000 µg/L
 3/3 SYR4 2013–2019
Fluoride
480 µg/L 12%
of the EPA limit 4000 µg/L
 3/3 SYR4 2013–2019
Nitrate-Nitrite
5000 µg/L 50%
of the EPA limit 10000 µg/L
 3/3 SYR4 2013–2019
TTHM
8.2 µg/L 10%
of the EPA limit 80 µg/L
 3/3 SYR4 2013–2019
Selenium
2.5 µg/L 5%
of the EPA limit 50 µg/L
 1/3 SYR4 2013–2019
Total Haloacetic Acids (HAA5)
1.1 µg/L 1.8%
of the EPA limit 60 µg/L
 1/3 SYR4 2013–2019
Xylenes, Total
0.8000 µg/L 0%
of the EPA limit 10000 µg/L
 1/6 SYR4 2013–2019
59 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 TetrachlorideChlordaneChromiumCombined Radium (-226 And -228)DichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorNitriteOxamylPentachlorophenolPicloramSimazineStyreneTetrachloroethyleneThallium, TotalTolueneToxapheneTrichloroethyleneVinyl Chloridecis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
ARMIJO, SUSAN
Phone
480-328-9281
Email
Susan.Armijo@gwresources.com

Frequently asked questions about Gw Ocotillo Water - Silverbell West

Is Gw Ocotillo Water - Silverbell West tap water safe to drink?

EPA monitoring detected 12 contaminants in Gw Ocotillo Water - Silverbell West'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 Gw Ocotillo Water - Silverbell West's water?

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

How many people does Gw Ocotillo Water - Silverbell West serve?

Gw Ocotillo Water - Silverbell West reports serving 263 people in Arizona, per its EPA record.

Has Gw Ocotillo Water - Silverbell West had any water quality violations?

The EPA has 107 violations on file for Gw Ocotillo Water - Silverbell West, of which 0 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.