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Gw Ocotillo Water - Diamond Bell

EPA monitoring tested this supplier for 73 contaminants and detected 15. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

73
contaminants tested
15
detected
706
people served
2
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.

2
health-based violations
27
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Resolved 2004-01-01 → 2004-01-31
MCL Health-based Resolved 2004-01-01 → 2004-01-31
Other Monitoring Resolved 2014-10-01
Other Monitoring Resolved 2014-10-01
MR Monitoring Resolved 2013-01-01 → 2013-03-31
MR Monitoring Resolved 2006-10-01
Other Monitoring Resolved 2006-07-01
MR Monitoring Resolved 2006-01-01 → 2006-12-31
MR Monitoring Resolved 2006-01-01 → 2006-12-31
Other Monitoring Resolved 2005-07-01

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
1800 µg/L 18%
of the EPA limit 10000 µg/L
 48/48 SYR4 2012–2019
Copper
251 µg/L 19%
of the EPA limit 1300 µg/L
 36/36 SYR4 2013–2019
Lead
2 µg/L 13%
of the EPA limit 15 µg/L
 36/36 SYR4 2013–2019
TTHM
52.6 µg/L 66%
of the EPA limit 80 µg/L
 14/14 SYR4 2013–2019
Total Haloacetic Acids (HAA5)
6.1 µg/L 10%
of the EPA limit 60 µg/L
 13/14 SYR4 2013–2019
Arsenic
4 µg/L 40%
of the EPA limit 10 µg/L
 7/7 SYR4 2013–2019
Barium
28 µg/L 1.4%
of the EPA limit 2000 µg/L
 7/7 SYR4 2013–2019
Fluoride
310 µg/L 7.8%
of the EPA limit 4000 µg/L
 7/7 SYR4 2013–2019
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
 7/7 LCR 2025
Nitrate-Nitrite
1700 µg/L 17%
of the EPA limit 10000 µg/L
 4/4 SYR4 2013
Chromium
1.5 µg/L 1.5%
of the EPA limit 100 µg/L
 2/7 SYR4 2013–2019
Combined Radium (-226 And -228)
0.6000 pCi/L 12%
of the EPA limit 5 pCi/L
 1/3 SYR4 2013–2016
Combined Uranium
3.4 µg/L 11%
of the EPA limit 30 µg/L
 1/1 SYR4 2013
Gross Alpha, Excl. Radon And U
0.3000 pCi/L 2%
of the EPA limit 15 pCi/L
 1/1 SYR4 2013
Xylenes, Total
1.3 µg/L 0%
of the EPA limit 10000 µg/L
 1/10 SYR4 2013–2019
58 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 TetrachlorideChlordaneDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorNitriteOxamylPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, 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 - Diamond Bell

Is Gw Ocotillo Water - Diamond Bell tap water safe to drink?

EPA monitoring detected 15 contaminants in Gw Ocotillo Water - Diamond Bell'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 - Diamond Bell's water?

EPA monitoring detected Nitrate, Copper, Lead, TTHM, Total Haloacetic Acids (HAA5), and others. The full list with the level and data source for each is above.

How many people does Gw Ocotillo Water - Diamond Bell serve?

Gw Ocotillo Water - Diamond Bell reports serving 706 people in Arizona, per its EPA record.

Has Gw Ocotillo Water - Diamond Bell had any water quality violations?

The EPA has 27 violations on file for Gw Ocotillo Water - Diamond Bell, of which 2 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.