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Tap water quality report

Lower Base, MP

EPA monitoring detected 2 contaminants across the 2 water suppliers serving Lower Base. A detection doesn't automatically mean the water is unsafe — see the level at the main supplier for each below, with its EPA source and period.

2
water suppliers
3,411
people served
2
contaminants found
MP rankings Lead in MP PFAS in MP

What was found in Lower Base's water

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

ContaminantLevel vs EPA limitSuppliersSource
TTHM
3.11 µg/L 3.9%
of the EPA limit 80 µg/L
Main supplier: Saipan Ice And Water · 3,101 people · 2019
Highest in the city: 6.2 µg/L — The Water Company · 310 people · 2016
2/2 SYR4
Lead
0.00050 mg/L 3.3%
of the EPA limit 0.0150 mg/L
Main supplier: Saipan Ice And Water · 3,101 people · 2022
Highest in the city: 0.0021 mg/L — The Water Company · 310 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. These are the utilities' own EPA-reported results, not a city-wide average. A detection means the lab measured the substance — it isn't the same as exceeding a legal limit. Hover a source tag to see the EPA program and years behind each figure.

Water suppliers serving Lower Base

SupplierPopulation served
Saipan Ice And Water 3,101
The Water Company 310

Frequently asked questions about Lower Base tap water

Is Lower Base tap water safe to drink?

EPA testing detected 2 contaminants in the water serving Lower Base. A detection isn't the same as a violation — most detected levels are within federal limits. Check the level and source for each contaminant above, and your utility's annual Consumer Confidence Report for the official compliance status.

How many water suppliers serve Lower Base?

2 public water suppliers report drinking-water monitoring for Lower Base, MP to the EPA. Each is listed above with its population served.

What contaminants are in Lower Base's water?

The contaminants EPA monitoring detected in Lower Base include TTHM, Lead. The full list, with the level at the main supplier and the data source, is in the table above.

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.