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Tap water quality report

Creston Water Supply

EPA monitoring tested this supplier for 95 contaminants and detected 25. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

95
contaminants tested
25
detected
7,536
people served
20
health-based violations
Iowa rankingsLead in IowaPFAS in Iowa
Water source
Surface water
Ownership
Local government
Counties served
Union

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.

20
health-based violations
51
violations on file
0
still open
ViolationTypeStatusPeriod
TT Health-based Resolved 2018-06-11 → 2018-07-11
TT Health-based Resolved 2018-06-11 → 2018-07-11
TT Health-based Resolved 2018-06-11 → 2018-07-11
TT Health-based Resolved 2018-06-11 → 2018-07-11
TT Health-based Resolved 2018-06-11 → 2018-07-11
TT Health-based Resolved 2017-08-01 → 2017-08-31
TT Health-based Resolved 2017-08-01 → 2017-08-31
TT Health-based Resolved 2017-08-01 → 2017-08-31
TT Health-based Resolved 2017-08-01 → 2017-08-31
TT Health-based Resolved 2017-08-01 → 2017-08-31

PFAS detected

PFAS are industrial “forever chemicals”. These are the EPA's latest nationwide test results (2023–2025).
ContaminantMaxDetection ratePeriod
Pfba 0.0051 µg/L 1/4 2023

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
Chlorite
753 µg/L 75%
of the EPA limit 1000 µg/L
worst single sample: 1100 µg/L
195/285 SYR4 2012–2019
Bromodichloromethane
16.85 µg/L
No EPA limit set
worst single sample: 18 µg/L
84/84 SYR4 2012–2019
Chloroform
43 µg/L
No EPA limit set
worst single sample: 79 µg/L
84/84 SYR4 2012–2019
Dichloroacetic Acid
23 µg/L
No EPA limit set
worst single sample: 78 µg/L
84/84 SYR4 2012–2019
TTHM
64.95 µg/L 81%
of the EPA limit 80 µg/L
worst single sample: 94 µg/L
84/84 SYR4 2012–2019
Dibromochloromethane
5.6 µg/L
No EPA limit set
worst single sample: 6.2 µg/L
82/84 SYR4 2012–2019
Total Haloacetic Acids (HAA5)
41 µg/L 68%
of the EPA limit 60 µg/L
worst single sample: 100 µg/L
78/84 SYR4 2012–2019
Trichloroacetic Acid
15.6 µg/L
No EPA limit set
worst single sample: 20 µg/L
77/84 SYR4 2012–2019
Copper
451.5 µg/L 35%
of the EPA limit 1300 µg/L
worst single sample: 720 µg/L
52/60 SYR4 2013–2019
Dibromoacetic Acid
1.75 µg/L
No EPA limit set
worst single sample: 6 µg/L
26/84 SYR4 2012–2019
Atrazine
0.9000 µg/L 30%
of the EPA limit 3 µg/L
worst single sample: 1 µg/L
25/33 SYR4 2012–2019
Nitrate
2255 µg/L 23%
of the EPA limit 10000 µg/L
worst single sample: 2300 µg/L
24/36 SYR4 2012–2019
Lead
13.9 µg/L 93%
of the EPA limit 15 µg/L
worst single sample: 17 µg/L
22/60 SYR4 2013–2019
Monochloroacetic Acid
5 µg/L
No EPA limit set
worst single sample: 8 µg/L
16/84 SYR4 2012–2019
Lead
0.0070 mg/L 47%
of the EPA limit 0.0150 mg/L
 14/14 LCR 2025
Dalapon
0.6700 µg/L 0.3%
of the EPA limit 200 µg/L
worst single sample: 0.7000 µg/L
4/6 SYR4 2012–2018
Arsenic
2 µg/L 20%
of the EPA limit 10 µg/L
 2/3 SYR4 2013–2019
Barium
128 µg/L 6.4%
of the EPA limit 2000 µg/L
worst single sample: 130 µg/L
2/2 SYR4 2013–2019
Di(2-ethylhexyl) Phthalate
0.9850 µg/L 16%
of the EPA limit 6 µg/L
worst single sample: 1 µg/L
2/13 SYR4 2012–2019
Fluoride
784.5 µg/L 20%
of the EPA limit 4000 µg/L
worst single sample: 790 µg/L
2/2 SYR4 2013–2019
Bromoform
0.5000 µg/L
No EPA limit set
 1/84 SYR4 2012–2019
Picloram
0.8000 µg/L 0.2%
of the EPA limit 500 µg/L
 1/6 SYR4 2012–2019
Xylenes, Total
1.5 µg/L 0%
of the EPA limit 10000 µg/L
 1/7 SYR4 2012–2019
P-Dichlorobenzene
0.5000 µg/L 0.7%
of the EPA limit 75 µg/L
 1/6 SYR4 2012–2019
70 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS2,4,5-TP2,4-D4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalAsbestosBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCyanideCadmiumCarbon TetrachlorideChromiumCombined Radium (-226 And -228)DichloromethaneDi(2-ethylhexyl) AdipateDinosebDiquatEthylbenzeneGlyphosateHfpo-DaLassoMercuryMonobromoacetic AcidNetfosaaNfdhaNmefosaaNitritePFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTrichloroethyleneVinyl Chloridecis-1,2-DichloroethyleneLithiumO-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
CRESTON WATER SUPPLY
Phone
641-782-5817
Email
[email protected]

Frequently asked questions about Creston Water Supply

Is Creston Water Supply tap water safe to drink?

EPA monitoring detected 25 contaminants in Creston 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 Creston Water Supply's water?

EPA monitoring detected Chlorite, Bromodichloromethane, Chloroform, Dichloroacetic Acid, TTHM, and others. The full list with the level and data source for each is above.

How many people does Creston Water Supply serve?

Creston Water Supply reports serving 7,536 people in Iowa, per its EPA record.

Has Creston Water Supply had any water quality violations?

The EPA has 51 violations on file for Creston Water Supply, of which 20 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.