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Tap water quality report

Cienega Water Company Inc

EPA monitoring tested this supplier for 71 contaminants and detected 11. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

71
contaminants tested
11
detected
108
people served
122
health-based violations
Arizona rankingsLead in ArizonaPFAS in Arizona
Water source
Ground water
Ownership
Private
Counties served
La Paz

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.

122
health-based violations
608
violations on file
16
still open
ViolationTypeStatusPeriod
MCL Health-based Archived 2025-04-01 → 2025-06-30
MCL Health-based Archived 2025-04-01 → 2025-06-30
MCL Health-based Archived 2025-04-01 → 2025-06-30
TT Health-based Addressed 2024-10-17
TT Health-based Addressed 2024-10-17
TT Health-based Addressed 2024-10-17
MCL Health-based Archived 2024-10-01 → 2024-12-31
MCL Health-based Archived 2024-10-01 → 2024-12-31
MCL Health-based Archived 2024-10-01 → 2024-12-31
MCL Health-based Resolved 2016-07-01 → 2016-09-30

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 95th percentile of this system's samples — over 100% is worth reading, but is not by itself a violation. Where a single sample came in higher than that percentile, it is noted under the bar. Formal violations are listed separately.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
Fluoride
5700 µg/L 143%
of the EPA limit, at the 95th percentile of samples — 4000 µg/L
worst single sample: 5800 µg/L
29/29 SYR4 2012–2019
Nitrate
1380 µg/L 14%
of the EPA limit 10000 µg/L
 20/20 SYR4 2012–2019
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
 10/10 LCR 2025
TTHM
6.27 µg/L 7.8%
of the EPA limit 80 µg/L
worst single sample: 6.9 µg/L
8/8 SYR4 2012–2019
Total Haloacetic Acids (HAA5)
2.663 µg/L 4.4%
of the EPA limit 60 µg/L
worst single sample: 2.78 µg/L
4/8 SYR4 2012–2019
Lead
8.12 µg/L 54%
of the EPA limit 15 µg/L
worst single sample: 8.8 µg/L
3/15 SYR4 2014–2018
Arsenic
6.13 µg/L 61%
of the EPA limit 10 µg/L
worst single sample: 6.2 µg/L
2/2 SYR4 2013–2018
Barium
27 µg/L 1.4%
of the EPA limit 2000 µg/L
 2/2 SYR4 2013–2018
Chromium
2.985 µg/L 3%
of the EPA limit 100 µg/L
worst single sample: 3 µg/L
2/2 SYR4 2013–2018
Copper
73 µg/L 5.6%
of the EPA limit 1300 µg/L
 1/15 SYR4 2014–2018
Nitrate-Nitrite
950 µg/L 9.5%
of the EPA limit 10000 µg/L
 1/1 SYR4 2013
60 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 TetrachlorideChlordaneCombined 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
KILGORE, DEBBIE
Phone
928-667-2590

Frequently asked questions about Cienega Water Company Inc

Is Cienega Water Company Inc tap water safe to drink?

EPA monitoring detected 11 contaminants in Cienega Water Company 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 Cienega Water Company Inc's water?

EPA monitoring detected Fluoride, Nitrate, 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 Cienega Water Company Inc serve?

Cienega Water Company Inc reports serving 108 people in Arizona, per its EPA record.

Has Cienega Water Company Inc had any water quality violations?

The EPA has 608 violations on file for Cienega Water Company Inc, of which 122 are health-based (a contaminant limit or required treatment was breached) and 16 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.