Tap WaterIndex

← Alton, IL

Tap water quality report

ZIP 62018 — Alton, IL

EPA monitoring across the 2 water suppliers serving ZIP 62018 in Alton, IL detected 28 contaminants. A detection doesn't automatically mean the water is unsafe — see the level at the main supplier below, with the EPA limit for each.

2
water suppliers
61,337
people served
28
contaminants found

What was found in ZIP 62018

The level at this ZIP's main supplier, the highest level anywhere in it, the EPA limit for each, and where the figure comes from.

ContaminantLevel vs EPA limitSuppliersSource
Nitrate
5292 µg/L 53%
of the EPA limit 10000 µg/L
Main supplier: IL AMERICAN-ALTON · 46,127 people · 2019
2/2 SYR4
Fluoride
1020 µg/L 26%
of the EPA limit 4000 µg/L
Main supplier: IL AMERICAN-ALTON · 46,127 people · 2019
Highest in the ZIP: 1043.3 µg/L — BETHALTO · 15,210 people · 2018
2/2 SYR4
Copper
356.3999999999999 µg/L 27%
of the EPA limit 1300 µg/L
Main supplier: IL AMERICAN-ALTON · 46,127 people · 2017
Highest in the ZIP: 892.9999999999998 µg/L — BETHALTO · 15,210 people · 2017
2/2 SYR4
TTHM
91.66499999999999 µg/L 115%
of the EPA limit, at the 95th percentile of samples — 80 µg/L
Main supplier: IL AMERICAN-ALTON · 46,127 people · 2019
2/2 SYR4
Chloroform
70.755 µg/L
No EPA limit set
Main supplier: IL AMERICAN-ALTON · 46,127 people · 2019
2/2 SYR4
Total Haloacetic Acids (HAA5)
54.489999999999995 µg/L 91%
of the EPA limit 60 µg/L
Main supplier: IL AMERICAN-ALTON · 46,127 people · 2019
2/2 SYR4
Barium
36.099999999999994 µg/L 1.8%
of the EPA limit 2000 µg/L
Highest in the ZIP: BETHALTO · 15,210 people · 2018
1/2 SYR4
Dichloroacetic Acid
29.65999999999999 µg/L
No EPA limit set
Main supplier: IL AMERICAN-ALTON · 46,127 people · 2019
2/2 SYR4
Trichloroacetic Acid
22.294999999999998 µg/L
No EPA limit set
Main supplier: IL AMERICAN-ALTON · 46,127 people · 2019
2/2 SYR4
Bromodichloromethane
20.3 µg/L
No EPA limit set
Main supplier: IL AMERICAN-ALTON · 46,127 people · 2019
2/2 SYR4
Lead
15.74999999999999 µg/L 105%
of the EPA limit, at the 95th percentile of samples — 15 µg/L
Main supplier: IL AMERICAN-ALTON · 46,127 people · 2017
2/2 SYR4
Dibromochloromethane
5.95 µg/L
No EPA limit set
Main supplier: IL AMERICAN-ALTON · 46,127 people · 2019
Highest in the ZIP: 14.359499999999999 µg/L — BETHALTO · 15,210 people · 2019
2/2 SYR4
Lithium
9.6 µg/L
No EPA limit set
Main supplier: IL AMERICAN-ALTON · 46,127 people · 2024
1/2 UCMR-5
Bromoform
9.10235 µg/L
No EPA limit set
Highest in the ZIP: BETHALTO · 15,210 people · 2019
1/2 SYR4
Monobromoacetic Acid
3.2949999999999986 µg/L
No EPA limit set
Main supplier: IL AMERICAN-ALTON · 46,127 people · 2019
Highest in the ZIP: 5.382 µg/L — BETHALTO · 15,210 people · 2019
2/2 SYR4
Dibromoacetic Acid
1.7 µg/L
No EPA limit set
Main supplier: IL AMERICAN-ALTON · 46,127 people · 2019
Highest in the ZIP: 5.34 µg/L — BETHALTO · 15,210 people · 2019
2/2 SYR4
Monochloroacetic Acid
5.274999999999999 µg/L
No EPA limit set
Main supplier: IL AMERICAN-ALTON · 46,127 people · 2019
2/2 SYR4
Selenium
3.3 µg/L 6.6%
of the EPA limit 50 µg/L
Highest in the ZIP: BETHALTO · 15,210 people · 2018
1/2 SYR4
Arsenic
1 µg/L 10%
of the EPA limit 10 µg/L
Main supplier: IL AMERICAN-ALTON · 46,127 people · 2019
Highest in the ZIP: 1.39 µg/L — BETHALTO · 15,210 people · 2018
2/2 SYR4
Combined Radium (-226 And -228)
0.9671 pCi/L 19%
of the EPA limit 5 pCi/L
Highest in the ZIP: BETHALTO · 15,210 people · 2019
1/2 SYR4
Trichloroethylene
0.6355 µg/L 13%
of the EPA limit 5 µg/L
Highest in the ZIP: BETHALTO · 15,210 people · 2018
1/2 SYR4
Atrazine
0.3000 µg/L 10%
of the EPA limit 3 µg/L
Main supplier: IL AMERICAN-ALTON · 46,127 people · 2019
1/2 SYR4
Pfba
0.0178 µg/L
No EPA limit set
Main supplier: IL AMERICAN-ALTON · 46,127 people · 2024
1/2 UCMR-5
Pfhxa
0.0062 µg/L
No EPA limit set
Main supplier: IL AMERICAN-ALTON · 46,127 people · 2024
1/2 UCMR-5
Pfpea
0.0056 µg/L
No EPA limit set
Main supplier: IL AMERICAN-ALTON · 46,127 people · 2024
1/2 UCMR-5
PFBS
0.0045 µg/L
No EPA limit set
Highest in the ZIP: BETHALTO · 15,210 people · 2025
1/2 UCMR-5
PFHXS
0.0036 µg/L
No EPA limit set
Highest in the ZIP: BETHALTO · 15,210 people · 2025
1/2 UCMR-5
Lead
0.0030 mg/L 20%
of the EPA limit 0.0150 mg/L
Main supplier: IL AMERICAN-ALTON · 46,127 people · 2025
2/2 LCR
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 the system's samples — over 100% is worth reading, but is not by itself a violation. Formal violations are listed separately.

Water suppliers serving ZIP 62018

SupplierStatePopulation served
IL AMERICAN-ALTON IL 46,127
BETHALTO IL 15,210

Frequently asked questions about ZIP 62018 tap water

Is the tap water in ZIP 62018 safe to drink?

EPA testing detected 28 contaminants across the water suppliers serving ZIP 62018. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and your utility's annual Consumer Confidence Report for the official status.

Which water suppliers serve ZIP 62018?

2 public water suppliers report EPA drinking-water monitoring for ZIP 62018. Each is listed above with its population served.

What contaminants are in ZIP 62018's water?

EPA monitoring detected Nitrate, Fluoride, Copper, TTHM, Chloroform, and others across this ZIP's suppliers. The full list with levels and sources is above.