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Tap water quality report

Rock Island Arsenal, Us Army

EPA monitoring tested this supplier for 108 contaminants and detected 21. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

108
contaminants tested
21
detected
7,800
people served
12
health-based violations
Illinois rankingsLead in IllinoisPFAS in Illinois
Water source
Surface water
Ownership
Federal government
Counties served
Rock Island

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.

12
health-based violations
34
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Resolved 2015-01-01 → 2015-03-31
MCL Health-based Resolved 2015-01-01 → 2015-03-31
MCL Health-based Resolved 2015-01-01 → 2015-03-31
MCL Health-based Resolved 2015-01-01 → 2015-03-31
MCL Health-based Resolved 2015-01-01 → 2015-03-31
MCL Health-based Resolved 2015-01-01 → 2015-03-31
MCL Health-based Resolved 2014-10-01 → 2014-12-31
MCL Health-based Resolved 2014-10-01 → 2014-12-31
MCL Health-based Resolved 2014-10-01 → 2014-12-31
MCL Health-based Resolved 2014-10-01 → 2014-12-31

PFAS detected

PFAS are industrial “forever chemicals”. These are the EPA's latest nationwide test results (2023–2025).
ContaminantMaxDetection ratePeriod
Pfba 0.0160 µg/L 4/4 2023
PFOA 0.0046 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
Chloroform
62.2 µg/L
No EPA limit set
worst single sample: 85.35 µg/L
57/57 SYR4 2012–2019
TTHM
66.08 µg/L 83%
of the EPA limit 80 µg/L
worst single sample: 90.46 µg/L
57/57 SYR4 2012–2019
Dichloroacetic Acid
51.85 µg/L
No EPA limit set
worst single sample: 75.9 µg/L
56/57 SYR4 2012–2019
Total Haloacetic Acids (HAA5)
69.85 µg/L 116%
of the EPA limit, at the 95th percentile of samples — 60 µg/L
worst single sample: 100.3 µg/L
56/57 SYR4 2012–2019
Trichloroacetic Acid
23.63 µg/L
No EPA limit set
worst single sample: 25.2 µg/L
52/57 SYR4 2012–2019
Bromodichloromethane
5.04165 µg/L
No EPA limit set
worst single sample: 13.06 µg/L
48/57 SYR4 2012–2019
Copper
192.5 µg/L 15%
of the EPA limit 1300 µg/L
worst single sample: 400 µg/L
36/40 SYR4 2014–2017
Nitrate
2800 µg/L 28%
of the EPA limit 10000 µg/L
 16/16 SYR4 2012–2019
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
 15/15 LCR 2023
Lead
12.6 µg/L 84%
of the EPA limit 15 µg/L
worst single sample: 14 µg/L
15/40 SYR4 2014–2017
Monochloroacetic Acid
5.3275 µg/L
No EPA limit set
worst single sample: 5.88 µg/L
14/57 SYR4 2012–2019
Monobromoacetic Acid
10.74 µg/L
No EPA limit set
worst single sample: 11.1 µg/L
10/57 SYR4 2012–2019
Barium
21.25 µg/L 1.1%
of the EPA limit 2000 µg/L
worst single sample: 23 µg/L
8/8 SYR4 2012–2019
Nitrate-Nitrite
1960 µg/L 20%
of the EPA limit 10000 µg/L
worst single sample: 2000 µg/L
5/5 SYR4 2012–2018
Arsenic
0.6165 µg/L 6.2%
of the EPA limit 10 µg/L
worst single sample: 0.6170 µg/L
2/8 SYR4 2012–2019
Bromoform
5.3078 µg/L
No EPA limit set
worst single sample: 5.324 µg/L
2/57 SYR4 2012–2019
Dibromochloromethane
11.377 µg/L
No EPA limit set
worst single sample: 11.46 µg/L
2/57 SYR4 2012–2019
Combined Radium (-226 And -228)
0.7520 pCi/L 15%
of the EPA limit 5 pCi/L
 1/1 SYR4 2014
Dibromoacetic Acid
1 µg/L
No EPA limit set
 1/57 SYR4 2012–2019
87 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS2,4,5-TP2,4-D4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneFluorideHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorNetfosaaNfdhaNmefosaaNitriteOxamylPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneLithiumO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
ST. LOUIS, LAURA
Phone
309-782-5366
Email
[email protected]

Frequently asked questions about Rock Island Arsenal, Us Army

Is Rock Island Arsenal, Us Army tap water safe to drink?

EPA monitoring detected 21 contaminants in Rock Island Arsenal, Us Army'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 Rock Island Arsenal, Us Army's water?

EPA monitoring detected Chloroform, TTHM, Dichloroacetic Acid, Total Haloacetic Acids (HAA5), Trichloroacetic Acid, and others. The full list with the level and data source for each is above.

How many people does Rock Island Arsenal, Us Army serve?

Rock Island Arsenal, Us Army reports serving 7,800 people in Illinois, per its EPA record.

Has Rock Island Arsenal, Us Army had any water quality violations?

The EPA has 34 violations on file for Rock Island Arsenal, Us Army, of which 12 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.