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Tap water quality report

Siloam Springs Waterworks

EPA monitoring tested this supplier for 109 contaminants and detected 23. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

109
contaminants tested
23
detected
21,430
people served
21
health-based violations
Arkansas rankingsLead in ArkansasPFAS in Arkansas
Water source
Surface water
Ownership
Local government
Counties served
Benton

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.

21
health-based violations
26
violations on file
0
still open
ViolationTypeStatusPeriod
TT Health-based Resolved 2021-07-01 → 2021-07-31
TT Health-based Resolved 2021-07-01 → 2021-07-31
TT Health-based Resolved 2021-07-01 → 2021-07-31
TT Health-based Resolved 2014-11-01 → 2014-11-30
TT Health-based Resolved 2014-11-01 → 2014-11-30
TT Health-based Resolved 2014-11-01 → 2014-11-30
MCL Health-based Resolved 2012-01-01 → 2012-01-31
MCL Health-based Resolved 2012-01-01 → 2012-01-31
MCL Health-based Resolved 2012-01-01 → 2012-01-31
MCL Health-based Resolved 2006-11-01 → 2006-11-30

PFAS detected

PFAS are industrial “forever chemicals”. These are the EPA's latest nationwide test results (2023–2025).
ContaminantMaxDetection ratePeriod
PFBS 0.0070 µg/L 4/4 2023
Pfpea 0.0055 µg/L 4/4 2023
Pfhxa 0.0038 µg/L 3/4 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
Dibromochloromethane
7.775 µg/L
No EPA limit set
worst single sample: 12.5 µg/L
118/120 SYR4 2012–2019
Bromodichloromethane
17.235 µg/L
No EPA limit set
worst single sample: 21.4 µg/L
114/114 SYR4 2012–2019
Chloroform
44.535 µg/L
No EPA limit set
worst single sample: 63.6 µg/L
114/114 SYR4 2012–2019
Dichloroacetic Acid
22.42 µg/L
No EPA limit set
worst single sample: 28.3 µg/L
108/108 SYR4 2012–2019
Total Haloacetic Acids (HAA5)
44.015 µg/L 73%
of the EPA limit 60 µg/L
worst single sample: 53.6 µg/L
108/108 SYR4 2012–2019
Trichloroacetic Acid
20.125 µg/L
No EPA limit set
worst single sample: 22.6 µg/L
108/108 SYR4 2012–2019
TTHM
69.985 µg/L 87%
of the EPA limit 80 µg/L
worst single sample: 85.4 µg/L
104/104 SYR4 2012–2019
Fluoride
960 µg/L 24%
of the EPA limit 4000 µg/L
worst single sample: 1000 µg/L
99/100 SYR4 2012–2019
Dibromoacetic Acid
2.2 µg/L
No EPA limit set
worst single sample: 3 µg/L
90/108 SYR4 2012–2019
Nitrate-Nitrite
3121 µg/L 31%
of the EPA limit 10000 µg/L
worst single sample: 3570 µg/L
39/39 SYR4 2012–2019
Monochloroacetic Acid
3.525 µg/L
No EPA limit set
worst single sample: 4.2 µg/L
26/108 SYR4 2012–2019
Copper
110 µg/L 8.5%
of the EPA limit 1300 µg/L
worst single sample: 160 µg/L
22/60 SYR4 2014–2017
Nitrate
2640 µg/L 26%
of the EPA limit 10000 µg/L
 16/16 SYR4 2012–2019
Lead
0.0010 mg/L 6.7%
of the EPA limit 0.0150 mg/L
 14/14 LCR 2025
Monobromoacetic Acid
1.7 µg/L
No EPA limit set
worst single sample: 2 µg/L
13/108 SYR4 2012–2019
Lead
4 µg/L 27%
of the EPA limit 15 µg/L
 11/72 SYR4 2012–2019
Bromoform
1.975 µg/L
No EPA limit set
worst single sample: 2 µg/L
6/114 SYR4 2012–2019
Gross Beta Particle Activity
4.125 pCi/L
No EPA limit set
worst single sample: 4.2 pCi/L
6/8 SYR4 2012–2019
Chromium
0.3240 µg/L 0.3%
of the EPA limit 100 µg/L
worst single sample: 0.3300 µg/L
3/16 SYR4 2012–2019
Simazine
0.1100 µg/L 2.8%
of the EPA limit 4 µg/L
 1/10 SYR4 2012–2019
86 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, TotalArsenicAtrazineBhc-GammaBariumBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorNetfosaaNfdhaNmefosaaNitriteOxamylPfbaPfdaPfdoaPfeesaPfhpaPfhpsPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneLithiumO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
NAPIER, JOSHUA
Phone
479-524-3513
Email
[email protected]

Frequently asked questions about Siloam Springs Waterworks

Is Siloam Springs Waterworks tap water safe to drink?

EPA monitoring detected 23 contaminants in Siloam Springs Waterworks'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 Siloam Springs Waterworks's water?

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

How many people does Siloam Springs Waterworks serve?

Siloam Springs Waterworks reports serving 21,430 people in Arkansas, per its EPA record.

Has Siloam Springs Waterworks had any water quality violations?

The EPA has 26 violations on file for Siloam Springs Waterworks, of which 21 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.