SIOUX CITY WATER SUPPLY
PWSID: IA9778054 · Sioux City, IA · Serves 85,791 people
According to EPA Safe Drinking Water Information System (SDWIS), SIOUX CITY WATER SUPPLY (PWSID IA9778054) in Sioux City, IA is listed as a CWS water system covering about 85,791 people. The same extract lists 10 health-based violation records spanning 2016-2019. Those 10 health-based rows for SIOUX CITY WATER SUPPLY cover contaminants such as Epichlorohydrin, TTHM; they remain historical EPA registry entries, not a current compliance or drinkability score.
SIOUX CITY WATER SUPPLY has 10 health-based violation records in this historical extract. Monitoring and reporting records are not included.
PlainEnviro's health-based SDWIS extract covers monitoring and reporting violations only -- it does not include unresolved enforcement actions in progress or corrective steps a utility has taken since the extract date. 2 distinct EPA contaminant codes appear in this system's record, including Epichlorohydrin, TTHM. Recorded violations span 2016–2019. Day-to-day primacy enforcement for this system runs through the Iowa drinking-water program, not EPA directly.
A historical health-based record does not necessarily describe current water quality or compliance. The most authoritative current source is the utility's annual Consumer Confidence Report. For enforcement history and corrective-action orders, consult EPA ECHO and the Iowa state drinking-water program's public portal.
System Details
- EPA ID (PWSID)
- IA9778054
- System Type
- CWS
- Water Source
- Surface Water
- Location
- Sioux City, IA
- Population Served
- 85,791
- Health Violations
- Yes (10)
What contaminants are in this water system?
| Contaminant | Violations | Health-Based |
|---|---|---|
| Epichlorohydrin | 6 | 6 |
| TTHM | 4 | 4 |
Violation History (10)
| Contaminant | Health | Date |
|---|---|---|
| TTHM | Yes | Oct 1, 2019 |
| TTHM | Yes | Oct 1, 2019 |
| TTHM | Yes | Jul 1, 2019 |
| TTHM | Yes | Jul 1, 2019 |
| Epichlorohydrin | Yes | Mar 6, 2017 |
| Epichlorohydrin | Yes | Mar 6, 2017 |
| Epichlorohydrin | Yes | Nov 25, 2016 |
| Epichlorohydrin | Yes | Nov 25, 2016 |
| Epichlorohydrin | Yes | May 19, 2016 |
| Epichlorohydrin | Yes | May 19, 2016 |
Frequently Asked Questions
What does EPA SDWIS list for SIOUX CITY WATER SUPPLY?
How many people does SIOUX CITY WATER SUPPLY serve?
What violations does SIOUX CITY WATER SUPPLY have?
What contaminants have been found in SIOUX CITY WATER SUPPLY water?
Compare beyond Iowa
Nationwide peers by violations & population served
Cross-state SDWIS systems nearest SIOUX CITY WATER SUPPLY on cumulative violation count (10) and EPA-reported population served (85,791). Violation-count peers include ETHETE WATER SYSTEM, Quechan Utility, Grand Canyon West. Population peers include TROY, HARLINGEN WATER WORKS SYSTEM, LATHAM WATER DISTRICT.
Similar violation count
Nearest cross-state community systems (500+ served) by SDWIS violations on record.
Similar population served
Nearest cross-state systems by EPA SDWIS population_served (same 500+ gate).
Nearby Water Systems
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About This Data
SIOUX CITY WATER SUPPLY (IA9778054) is drawn from EPA SDWIS. Nearby county systems in this extract include SERGEANT BLUFF WATER SUPPLY; MOVILLE WATER SUPPLY; SLOAN WATER SUPPLY; LAWTON WATER SUPPLY. Health-based rows (10 MCL/TT) are historical registry state, not a current drinkability score.
Source: U.S. Environmental Protection Agency, SDWIS Federal Reporting Services
Read our methodology - how this data is sourced, computed, and verified.