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Tap water quality report

Marana Municipal - Marana

EPA monitoring tested this supplier for 110 contaminants and detected 22. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

110
contaminants tested
22
detected
15,162
people served
1
health-based violations
Arizona rankingsLead in ArizonaPFAS in Arizona
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.

1
health-based violations
160
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Resolved 2008-09-01 → 2008-09-30
MR Monitoring Resolved 2023-10-01 → 2023-12-31
MR Monitoring Resolved 2023-10-01 → 2023-12-31
MR Monitoring Resolved 2021-07-01 → 2021-09-30
MR Monitoring Resolved 2021-07-01 → 2021-09-30
Other Monitoring Resolved 2017-07-01
MR Monitoring Resolved 2015-01-01 → 2015-01-31
MR Monitoring Resolved 2015-01-01 → 2015-01-31
MR Monitoring Resolved 2015-01-01 → 2015-03-31
MR Monitoring Resolved 2015-01-01 → 2015-03-31

PFAS detected

PFAS are industrial “forever chemicals”. These are the EPA's latest nationwide test results (2023–2025).
ContaminantMaxDetection ratePeriod
PFBS 0.0031 µg/L 2/4 2025
Pfhxa 0.0039 µg/L 2/4 2025
PFHXS 0.0207 µg/L 2/4 2025
PFOA 0.0063 µg/L 2/4 2025
PFOS 0.0179 µg/L 2/4 2025
Pfpea 0.0034 µg/L 2/4 2025

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
Nitrate
5675 µg/L 57%
of the EPA limit 10000 µg/L
worst single sample: 6700 µg/L
66/66 SYR4 2012–2019
Copper
104.5 µg/L 8%
of the EPA limit 1300 µg/L
worst single sample: 2000 µg/L
38/41 SYR4 2014–2017
TTHM
11.54 µg/L 14%
of the EPA limit 80 µg/L
worst single sample: 12.2 µg/L
12/13 SYR4 2012–2019
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
 11/11 LCR 2023
Lead
2.475 µg/L 17%
of the EPA limit 15 µg/L
worst single sample: 2.5 µg/L
6/41 SYR4 2014–2017
Nitrate-Nitrite
4572 µg/L 46%
of the EPA limit 10000 µg/L
worst single sample: 4600 µg/L
5/5 SYR4 2012–2017
Barium
68.75 µg/L 3.4%
of the EPA limit 2000 µg/L
worst single sample: 71 µg/L
4/4 SYR4 2014–2017
Fluoride
687 µg/L 17%
of the EPA limit 4000 µg/L
worst single sample: 690 µg/L
4/4 SYR4 2014–2017
Lithium
43.6 µg/L
No EPA limit set
 4/4 UCMR-5 2025
Total Haloacetic Acids (HAA5)
2.42 µg/L 4%
of the EPA limit 60 µg/L
worst single sample: 2.5 µg/L
3/13 SYR4 2012–2019
Arsenic
3.295 µg/L 33%
of the EPA limit 10 µg/L
worst single sample: 3.3 µg/L
2/4 SYR4 2014–2017
Bromoform
1.1 µg/L
No EPA limit set
 1/1 SYR4 2019
Chromium
1.1 µg/L 1.1%
of the EPA limit 100 µg/L
 1/4 SYR4 2014–2017
Combined Radium (-226 And -228)
0.5000 pCi/L 10%
of the EPA limit 5 pCi/L
 1/9 SYR4 2014–2018
Di(2-ethylhexyl) Phthalate
1.9 µg/L 32%
of the EPA limit 6 µg/L
 1/18 SYR4 2014–2019
Dibromochloromethane
1.1 µg/L
No EPA limit set
 1/1 SYR4 2019
88 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) AdipateDibromoacetic AcidDichloroacetic AcidDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidMonochloroacetic AcidNetfosaaNfdhaNmefosaaNitriteOxamylPfbaPfdaPfdoaPfeesaPfhpaPfhpsPfmbaPfmpaPFNAPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneToxapheneTrichloroacetic AcidTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
LASHAM, HEIDI
Phone
520-382-1900

Frequently asked questions about Marana Municipal - Marana

Is Marana Municipal - Marana tap water safe to drink?

EPA monitoring detected 22 contaminants in Marana Municipal - Marana'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 Marana Municipal - Marana's water?

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

How many people does Marana Municipal - Marana serve?

Marana Municipal - Marana reports serving 15,162 people in Arizona, per its EPA record.

Has Marana Municipal - Marana had any water quality violations?

The EPA has 160 violations on file for Marana Municipal - Marana, of which 1 is 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.