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Tap water quality report

Charter Oak Water Supply

EPA monitoring tested this supplier for 59 contaminants and detected 15. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

59
contaminants tested
15
detected
522
people served
22
health-based violations
Iowa rankingsLead in IowaPFAS in Iowa
Water source
GWP
Ownership
Local government
Counties served
Crawford

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.

22
health-based violations
132
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Resolved 2002-06-01 → 2002-06-30
MCL Health-based Resolved 2002-06-01 → 2002-06-30
MCL Health-based Resolved 2002-06-01 → 2002-06-30
MCL Health-based Resolved 2002-06-01 → 2002-06-30
MCL Health-based Resolved 2002-06-01 → 2002-06-30
MCL Health-based Resolved 2001-05-01 → 2001-05-31
MCL Health-based Resolved 2001-05-01 → 2001-05-31
MCL Health-based Resolved 2001-05-01 → 2001-05-31
MCL Health-based Resolved 2001-05-01 → 2001-05-31
MCL Health-based Resolved 2001-05-01 → 2001-05-31

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
Copper
995.5 µg/L 77%
of the EPA limit 1300 µg/L
worst single sample: 1200 µg/L
30/30 SYR4 2012–2018
Lead
0.0030 mg/L 20%
of the EPA limit 0.0150 mg/L
 15/15 LCR 2024
Bromodichloromethane
13.25 µg/L
No EPA limit set
worst single sample: 14 µg/L
6/6 SYR4 2013–2018
Bromoform
1.6 µg/L
No EPA limit set
 6/6 SYR4 2013–2018
Chloroform
12 µg/L
No EPA limit set
worst single sample: 13 µg/L
6/6 SYR4 2013–2018
Dibromoacetic Acid
3 µg/L
No EPA limit set
 6/6 SYR4 2013–2018
Dibromochloromethane
9.625 µg/L
No EPA limit set
worst single sample: 10 µg/L
6/6 SYR4 2013–2018
Dichloroacetic Acid
5.5 µg/L
No EPA limit set
worst single sample: 6 µg/L
6/6 SYR4 2013–2018
TTHM
36.5 µg/L 46%
of the EPA limit 80 µg/L
worst single sample: 39 µg/L
6/6 SYR4 2013–2018
Total Haloacetic Acids (HAA5)
12 µg/L 20%
of the EPA limit 60 µg/L
worst single sample: 13 µg/L
6/6 SYR4 2013–2018
Trichloroacetic Acid
3.75 µg/L
No EPA limit set
worst single sample: 4 µg/L
6/6 SYR4 2013–2018
Lead
11.1 µg/L 74%
of the EPA limit 15 µg/L
worst single sample: 12 µg/L
3/30 SYR4 2012–2018
Barium
270 µg/L 14%
of the EPA limit 2000 µg/L
 1/1 SYR4 2013
Fluoride
1000 µg/L 25%
of the EPA limit 4000 µg/L
 1/1 SYR4 2013
Vinyl Chloride
1.7 µg/L 85%
of the EPA limit 2 µg/L
 1/2 SYR4 2014–2015
44 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-Dichloroethane1,2-Dichloropropane2,4,5-TP2,4-DAntimony, TotalArsenicAtrazineBenzeneBenzo(A)PyreneChlorobenzeneCadmiumCarbon TetrachlorideChromiumCombined Radium (-226 And -228)DichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebEthylbenzeneLassoMercuryMonobromoacetic AcidMonochloroacetic AcidNitrateNitritePentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTrichloroethyleneXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
CHARTER OAK WATER SUPPLY
Phone
712-269-1106
Email
charteroakmaintenance@gmail.com

Frequently asked questions about Charter Oak Water Supply

Is Charter Oak Water Supply tap water safe to drink?

EPA monitoring detected 15 contaminants in Charter Oak Water Supply'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 Charter Oak Water Supply's water?

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

How many people does Charter Oak Water Supply serve?

Charter Oak Water Supply reports serving 522 people in Iowa, per its EPA record.

Has Charter Oak Water Supply had any water quality violations?

The EPA has 132 violations on file for Charter Oak Water Supply, of which 22 are 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.