Rathbun Reg Water Assn (Ft Madison)Water quality report
- Serves
- 11,840
- Connections
- 4,735
- Water source
- Surface water bought from another system
- Based in
- Fort Madison, IA
- County
- Lee
- Owner
- Private
The 23 ZIP codes it serves
52601, 52619, 52620, 52623, 52624, 52625, 52626, 52627, 52630, 52631, 52632, 52639, 52645, 52649, 52656, 52657, 52658, 62341, 62354, 62358, 62379, 63430, 63465
PWSID IA0400901 · EPA data
Read this first
- Lithium was found in two of 6 samples, highest 16 ppb. Above EPA’s health reference level of 10 ppb, a screening level rather than an enforceable limit.
No health-based violations on file since 2016. EPA lists 2 monitoring or reporting violations, which are paperwork and testing lapses rather than water quality findings.
What was found, stop by stop
- Below the health goal
- Above the health goal
- Above the legal limit
- No federal data
At the source
EPA UCMR 5 sampled this utility for 29 PFAS and lithium from Dec. 13, 2023 to Sept. 18, 2024. Each tick under a result’s line is one sample where it was found, dated when you point at it.
- Health reference level 1016
Above EPA’s health reference level of 10 ppb, a screening level rather than an enforceable limit.
What handles it: No certification claim covers this compound yet.
Also found, with no federal limit
EPA measured these PFAS to learn how often they occur. None has a legal limit or a health goal yet.
Compound Highest sample Found in Certification claim PFBA 12 ppt 2 of 5 None covers it In treatment
No federal results for this stop. Disinfection byproduct, chlorine and fluoride levels are in Rathbun Reg Water Assn (Ft Madison)’s own annual report, which it must send you every year.
In the pipes
No lead and copper results on file with EPA for this utility.
At your tap
The last stretch is your own plumbing. A certified lab test is the only way to know what reaches your glass. Lead in your water: what to do
Tested and not found
Below EPA’s minimum reporting level in every sample taken from Dec. 13, 2023 to Sept. 18, 2024. Not found means not measured above that level, which is not the same as zero.
All 29 compounds tested and not found
- 11Cl-PF3OUdS
- 4:2 FTS
- 6:2 FTS
- 8:2 FTS
- 9Cl-PF3ONS
- ADONA
- HFPO-DA (GenX)
- Lead
- NEtFOSAA
- NFDHA
- NMeFOSAA
- PFBS
- PFDA
- PFDoA
- PFEESA
- PFHpA
- PFHpS
- PFHxA
- PFHxS
- PFMBA
- PFMPA
- PFNA
- PFOA
- PFOS
- PFPeA
- PFPeS
- PFTA
- PFTrDA
- PFUnA
Violations since 2016
No health-based violations on file with EPA since 2016. There are 2 monitoring or reporting violations: a sample missed, late or not reported.
What this report cannot tell you
- Levels of everything else. Federal bulk data carries results for PFAS, lithium, lead and copper, and violations for the rest. Nitrate, arsenic, disinfection byproducts and other levels are in Rathbun Reg Water Assn (Ft Madison)’s own annual report, which it must send you every year.
- Your own plumbing. Lead results are the 90th percentile across homes the utility samples. Your home’s service line, solder and fixtures decide yours. A certified lab test is the only way to know.
- Anything after the latest data. SDWIS data is from 2026 Q2; UCMR 5 samples are from Dec. 13, 2023 to Sept. 18, 2024.
Other Iowa utilities
- Des Moines Water Works246,055
- Iowa - American WTR Co - Davenport147,720
- Cedar Rapids Water Department142,364
- Sioux City Water Supply85,791
- City of Ankeny76,207
- West Des Moines Water Works73,959
- Waterloo Water Works69,504
- Iowa City Water Department68,753
- Council Bluffs Water Works64,447
- Dubuque Water Works59,667
- Ames Water Treatment Plant55,177
- Urbandale Water Utility45,605
Sources
- EPA UCMR 5 occurrence data, file of Aug. 27, 2026
- EPA SDWA bulk download (SDWIS federal data), 2026 Q2
- Limits and goals: each contaminant’s page, with its EPA source.
- How this page is built: methodology.