Pima County · Arizona · EPA SDWIS 2026Q2
Marana Water Quality
What's in Marana's water
PFAS (forever chemicals)
5.8×above guideline
Detected above the EPA's 4 ppt limit for PFOA/PFOS — the "forever chemicals" linked to cancer and immune effects. Compounds found: PFBA, PFBS, PFHxA, PFHxS, PFOA, PFOS, PFPeA.
Nitrate
Violation on record
4 EPA violations on record (most recent 2021). Nitrate enters water mainly from fertilizer runoff, septic systems, and animal waste. High levels can interfere with the blood's ability to carry oxygen, a special danger for infants. Long-term low-level exposure has also been linked to elevated cancer risk in some studies.
Total Trihalomethanes (TTHM)
Violation on record
3 EPA violations on record (most recent 2024). TTHM form when chlorine used to disinfect water reacts with natural organic matter. Long-term exposure has been linked to increased cancer risk and to harm in pregnancy. Levels often rise in warmer months and in systems with more organic material.
Haloacetic Acids (HAA5)
Violation on record
3 EPA violations on record (most recent 2024). HAA5 are a second group of chlorine disinfection byproducts formed when chlorine reacts with organic matter in water. Long-term exposure is associated with increased cancer risk and possible developmental effects. They commonly occur together with trihalomethanes.
Water hardness
very hard
Marana's water is very hard. Hardness isn't a health risk, but it drives scale on fixtures and water heaters, shortens appliance life, and leaves skin and hair dry.
Your water provider
MARANA MUNICIPAL - MARANA
- Population served
- 15,162
- PWSID
- AZ0410150
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