Home › By state › Iowa › Sioux City Water Supply

Sioux City Water Supply water quality

EPA test results and violation history for Sioux City Water Supply in Iowa. Public water system ID IA9778054. Serves ZIP codes 51101, 51102, 51103, 51104, 51105, 51106, 51107, 51108, 51111.

6max PFOA, ppt (limit 4)
4.3max PFOS, ppt (limit 4)
9of 29 PFAS detected
—lead, ppb (90th percentile)

ND = not detected. PFAS from EPA UCMR 5 (2023–2025); lead and violations from EPA SDWIS.

What EPA records show for Sioux City Water Supply

  • PFAS above EPA's limit (6 ppt)Highest PFOA 6 ppt, PFOS 4.3 ppt in EPA UCMR 5 testing. EPA's limit is 4 ppt each.

Reverse osmosis is the right fit for your water

Your utility's PFAS results exceed EPA's 4 ppt limit. Reverse osmosis is the most effective home option for PFAS and also handles lead, nitrate and arsenic.

Best match for your water

iSpring RCC7AK Under-Sink Reverse Osmosis System

Under-sink reverse osmosis · $$
  • Good for: PFAS, nitrate, arsenic, fluoride, radium, lead and most other dissolved contaminants
  • Install: Under the kitchen sink, about an hour with basic tools
  • Manufacturer lists NSF/ANSI 58 testing. Reverse osmosis is the treatment EPA names as most effective for PFAS.
Check price on Amazon

Other good options

Bluevua RO100ROPOT Countertop Reverse Osmosis

Countertop reverse osmosis · $$$
  • Good for: PFAS, nitrate, arsenic and lead without touching the plumbing
  • Install: No install; sits on the counter. Good for renters
  • Manufacturer lists WQA certification to NSF/ANSI 58.
Check price on Amazon

ZeroWater 10-Cup Pitcher

Pitcher · $
  • Good for: A low-cost first step for PFOA/PFOS and lead
  • Install: None
  • Manufacturer lists IAPMO certification for lead, chromium and PFOA/PFOS reduction.
Check price on Amazon

As an Amazon Associate we earn from qualifying purchases. Data comes from EPA public records, which cover your utility, not your home's own pipes.

Check your exact address

Utility boundaries don't always follow ZIP codes. Enter your address to confirm which system serves you.

Free. A ZIP code works; a full address is more exact. We don't store it.

Questions

Does Sioux City Water Supply water have PFAS?

Yes. EPA UCMR 5 testing detected PFBA, PFBS, PFHpA, PFHxA, PFHxS, PFOA, PFOS, PFPeA, PFPeS. The highest PFOA result was 6 ppt and the highest PFOS result was 4.3 ppt, against an EPA limit of 4 ppt each.

Is Sioux City Water Supply tap water safe to drink?

Its PFAS levels are above EPA's new limit, which utilities must meet by the end of the decade. Lead from home plumbing isn't captured by utility data, so a certified filter is worthwhile in older homes.

What water filter should I use in Sioux City Water Supply's service area?

Reverse osmosis is the right fit for your water. Your utility's PFAS results exceed EPA's 4 ppt limit. Reverse osmosis is the most effective home option for PFAS and also handles lead, nitrate and arsenic.

Nearby water systems