Tap WaterIndex

← Arizona

Tap water quality report

Gw -Bwc, Inc.- Nswc

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
319
people served
0
health-based violations
Arizona rankingsLead in ArizonaPFAS in Arizona
Water source
Ground water
Ownership
Private
Counties served
Maricopa

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
87
violations on file
0
still open
ViolationTypeStatusPeriod
MR Monitoring Resolved 2024-04-01 → 2024-04-30
MR Monitoring Resolved 2024-04-01 → 2024-04-30
MR Monitoring Resolved 2024-04-01 → 2024-04-30
MR Monitoring Resolved 2022-10-01 → 2022-12-31
MR Monitoring Resolved 2022-10-01 → 2022-12-31
MR Monitoring Resolved 2019-07-01 → 2019-09-30
MR Monitoring Resolved 2019-07-01 → 2019-09-30
Other Monitoring Resolved 2016-07-01
Other Monitoring Resolved 2015-07-01
MR Monitoring Resolved 2012-01-01 → 2012-12-31

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
2400 µg/L 24%
of the EPA limit 10000 µg/L
 16/16 SYR4 2012–2019
Copper
570 µg/L 44%
of the EPA limit 1300 µg/L
 15/15 SYR4 2012–2018
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
 9/9 LCR 2024
Lead
7.3 µg/L 49%
of the EPA limit 15 µg/L
 8/15 SYR4 2012–2018
TTHM
63 µg/L 79%
of the EPA limit 80 µg/L
 6/6 SYR4 2014–2019
Total Haloacetic Acids (HAA5)
22 µg/L 37%
of the EPA limit 60 µg/L
 4/6 SYR4 2014–2019
Arsenic
4.3 µg/L 43%
of the EPA limit 10 µg/L
 1/1 SYR4 2012
Barium
47 µg/L 2.4%
of the EPA limit 2000 µg/L
 1/1 SYR4 2012
Fluoride
1600 µg/L 40%
of the EPA limit 4000 µg/L
 1/1 SYR4 2012
Nitrate-Nitrite
2300 µg/L 23%
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 TetrachlorideChlordaneChromiumCombined Radium (-226 And -228)DichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorNitriteOxamylPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-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 -Bwc, Inc.- Nswc

Is Gw -Bwc, Inc.- Nswc tap water safe to drink?

EPA monitoring detected 10 contaminants in Gw -Bwc, Inc.- Nswc'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 -Bwc, Inc.- Nswc'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 Gw -Bwc, Inc.- Nswc serve?

Gw -Bwc, Inc.- Nswc reports serving 319 people in Arizona, per its EPA record.

Has Gw -Bwc, Inc.- Nswc had any water quality violations?

The EPA has 87 violations on file for Gw -Bwc, Inc.- Nswc, 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.