Is Flowing Wells Irrigation District Tap Water Safe? Quality Report

Water source: Ground water
Ownership: Private
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.

health-based violations

1,045

violations on file

still open

Violation	Type	Status	Period
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	2001-01-01 → 2003-12-31
RPT	Monitoring	Unaddressed	2026-02-01
MR	Monitoring	Unaddressed	2026-01-01
MR	Monitoring	Resolved	2025-07-01 → 2025-09-30
MR	Monitoring	Resolved	2025-07-01 → 2025-09-30
MR	Monitoring	Resolved	2025-07-01 → 2025-09-30

PFAS detected

PFAS are industrial “forever chemicals”. These are the EPA's latest nationwide test results (2023–2025).

Contaminant	Max	Detection rate	Period
PFHXS	0.0090 µg/L	5/12	2023
PFBS	0.0040 µg/L	2/12	2023
Pfhxa	0.0030 µg/L	2/12	2023
PFOA	0.0050 µg/L	2/12	2023
PFOS	0.0060 µg/L	2/12	2023
Pfpea	0.0040 µg/L	2/12	2023

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.

Contaminant	Level vs EPA limit	Detection rate	Source	Period
TTHM	8.19 µg/L 10% of the EPA limit 80 µg/L worst single sample: 13.6 µg/L	103/103	SYR4	2012–2019
Nitrate	2910 µg/L 29% of the EPA limit 10000 µg/L worst single sample: 3760 µg/L	96/96	SYR4	2012–2019
Copper	158.5 µg/L 12% of the EPA limit 1300 µg/L worst single sample: 230 µg/L	84/93	SYR4	2013–2019
Nitrate-Nitrite	2909.5 µg/L 29% of the EPA limit 10000 µg/L worst single sample: 3760 µg/L	42/42	SYR4	2013–2019
Arsenic	9.11 µg/L 91% of the EPA limit 10 µg/L worst single sample: 15 µg/L	23/24	SYR4	2013–2019
Barium	90.1 µg/L 4.5% of the EPA limit 2000 µg/L worst single sample: 91 µg/L	19/20	SYR4	2013–2019
Fluoride	541 µg/L 14% of the EPA limit 4000 µg/L worst single sample: 550 µg/L	19/20	SYR4	2013–2019
Total Haloacetic Acids (HAA5)	2.44 µg/L 4.1% of the EPA limit 60 µg/L worst single sample: 3.8 µg/L	18/103	SYR4	2012–2019
Selenium	8.75 µg/L 18% of the EPA limit 50 µg/L worst single sample: 8.9 µg/L	16/20	SYR4	2013–2019
Lead	31.54 µg/L 210% of the EPA limit, at the 95th percentile of samples — 15 µg/L worst single sample: 61 µg/L	13/93	SYR4	2013–2019
Bromoform	3.66 µg/L No EPA limit set worst single sample: 4.1 µg/L	12/12	SYR4	2019
Lithium	228 µg/L No EPA limit set	11/12	UCMR-5	2023
Lead	0.0 mg/L 0% of the EPA limit 0.0150 mg/L	9/9	LCR	2025
Dibromochloromethane	0.9800 µg/L No EPA limit set worst single sample: 1 µg/L	5/12	SYR4	2019
Trichloroethylene	6.02 µg/L 120% of the EPA limit, at the 95th percentile of samples — 5 µg/L worst single sample: 7.1 µg/L	5/25	SYR4	2012–2019
Chromium	6 µg/L 6% of the EPA limit 100 µg/L	2/20	SYR4	2013–2019
Combined Radium (-226 And -228)	0.9000 pCi/L 18% of the EPA limit 5 pCi/L	1/15	SYR4	2016–2019
Xylenes, Total	2.3 µg/L 0% of the EPA limit 10000 µg/L	1/25	SYR4	2012–2019

87 contaminants tested, none detected

1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS2,3,7,8-TCDD2,4,5-TP2,4-D4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalAsbestosAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalBromodichloromethaneChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneChloroformDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDibromoacetic AcidDichloroacetic AcidDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateGross Beta Particle ActivityHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidMonochloroacetic AcidNetfosaaNfdhaNmefosaaNitriteOxamylPfbaPfdaPfdoaPfeesaPfhpaPfhpsPfmbaPfmpaPFNAPfpesPftaPftrdaPfunaPentachlorophenolPicloramSimazineStyreneTetrachloroethyleneThallium, TotalTolueneToxapheneTrichloroacetic AcidVinyl Chloridecis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact: FLOWING WELLS IRRIGATION DIST
Phone: 520-887-4192
Email: [email protected]

Frequently asked questions about Flowing Wells Irrigation District

Is Flowing Wells Irrigation District tap water safe to drink?

EPA monitoring detected 24 contaminants in Flowing Wells Irrigation District'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 Flowing Wells Irrigation District's water?

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

How many people does Flowing Wells Irrigation District serve?

Flowing Wells Irrigation District reports serving 16,000 people in Arizona, per its EPA record.

Has Flowing Wells Irrigation District had any water quality violations?

The EPA has 1045 violations on file for Flowing Wells Irrigation District, of which 5 are health-based (a contaminant limit or required treatment was breached) and 2 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.