Tap WaterIndex

← San Luis, AZ

Tap water quality report

ZIP 85349 — San Luis, AZ

EPA monitoring across the 2 water suppliers serving ZIP 85349 in San Luis, AZ detected 21 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
43,902
people served
21
contaminants found

What was found in ZIP 85349

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
1037.5 µg/L 10%
of the EPA limit 10000 µg/L
Main supplier: SAN LUIS CITY OF · 39,705 people · 2019
2/2 SYR4
Copper
663.15 µg/L 51%
of the EPA limit 1300 µg/L
Main supplier: SAN LUIS CITY OF · 39,705 people · 2018
2/2 SYR4
Fluoride
282.5 µg/L 7.1%
of the EPA limit 4000 µg/L
Main supplier: SAN LUIS CITY OF · 39,705 people · 2018
2/2 SYR4
Nitrate-Nitrite
188 µg/L 1.9%
of the EPA limit 10000 µg/L
Main supplier: SAN LUIS CITY OF · 39,705 people · 2015
1/2 SYR4
Barium
120 µg/L 6%
of the EPA limit 2000 µg/L
Main supplier: SAN LUIS CITY OF · 39,705 people · 2018
2/2 SYR4
Lithium
103 µg/L
No EPA limit set
Main supplier: SAN LUIS CITY OF · 39,705 people · 2025
2/2 UCMR-5
TTHM
81.585 µg/L 102%
of the EPA limit, at the 95th percentile of samples — 80 µg/L
Main supplier: SAN LUIS CITY OF · 39,705 people · 2019
2/2 SYR4
Dibromochloromethane
42.5 µg/L
No EPA limit set
Main supplier: SAN LUIS CITY OF · 39,705 people · 2017
1/2 SYR4
Lead
4.733 µg/L 32%
of the EPA limit 15 µg/L
Main supplier: SAN LUIS CITY OF · 39,705 people · 2018
Highest in the ZIP: 30.18 µg/L — ASPC YUMA · 4,197 people · 2017
2/2 SYR4
Total Haloacetic Acids (HAA5)
18.54 µg/L 31%
of the EPA limit 60 µg/L
Main supplier: SAN LUIS CITY OF · 39,705 people · 2019
2/2 SYR4
Di(2-ethylhexyl) Phthalate
13.7 µg/L 228%
of the EPA limit, at the 95th percentile of samples — 6 µg/L
Main supplier: SAN LUIS CITY OF · 39,705 people · 2019
1/2 SYR4
Dibromoacetic Acid
9.2 µg/L
No EPA limit set
Main supplier: SAN LUIS CITY OF · 39,705 people · 2019
1/2 SYR4
Selenium
5.2 µg/L 10%
of the EPA limit 50 µg/L
Main supplier: SAN LUIS CITY OF · 39,705 people · 2018
2/2 SYR4
Combined Radium (-226 And -228)
3.944 pCi/L 79%
of the EPA limit 5 pCi/L
Main supplier: SAN LUIS CITY OF · 39,705 people · 2018
2/2 SYR4
Arsenic
2.2835 µg/L 23%
of the EPA limit 10 µg/L
Main supplier: SAN LUIS CITY OF · 39,705 people · 2018
1/2 SYR4
Gross Alpha, Excl. Radon And U
2.23 pCi/L 15%
of the EPA limit 15 pCi/L
Main supplier: SAN LUIS CITY OF · 39,705 people · 2015
2/2 SYR4
Thallium, Total
0.8005 µg/L 40%
of the EPA limit 2 µg/L
Main supplier: SAN LUIS CITY OF · 39,705 people · 2018
1/2 SYR4
Beryllium, Total
0.5300 µg/L 13%
of the EPA limit 4 µg/L
Main supplier: SAN LUIS CITY OF · 39,705 people · 2018
1/2 SYR4
Antimony, Total
0.2000 µg/L 3.3%
of the EPA limit 6 µg/L
Main supplier: SAN LUIS CITY OF · 39,705 people · 2018
1/2 SYR4
Mercury
0.0700 µg/L 3.5%
of the EPA limit 2 µg/L
Main supplier: SAN LUIS CITY OF · 39,705 people · 2018
1/2 SYR4
Lead
0.0010 mg/L 6.7%
of the EPA limit 0.0150 mg/L
Main supplier: SAN LUIS CITY OF · 39,705 people · 2024
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 85349

SupplierStatePopulation served
SAN LUIS CITY OF AZ 39,705
ASPC YUMA AZ 4,197

Frequently asked questions about ZIP 85349 tap water

Is the tap water in ZIP 85349 safe to drink?

EPA testing detected 21 contaminants across the water suppliers serving ZIP 85349. 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 85349?

2 public water suppliers report EPA drinking-water monitoring for ZIP 85349. Each is listed above with its population served.

What contaminants are in ZIP 85349's water?

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