Swap the filter cartridge at the Korail Basti household on a quarterly cycle (2026-07-20)

A household filter needs its cartridge changed on schedule to keep protecting the household, especially important where flooding raises contamination risk. This recurring visit keeps the previously installed Korail filter performing to standard. Standard: WHO Guidelines for Drinking-water Quality (household water treatment) + SDG 6.1 safe drinking water. Proof: Photo of new cartridge + leak-free running-water test Method (WHO Guidelines for Drinking-water Quality (household water treatment) + SDG 6.1 safe drinking water.): 1. Confirm the household invitation and locate the installed filter unit. 2. Check the cartridge change indicator and flow rate. 3. Remove the old cartridge and install a fresh certified replacement. 4. Run water through the filter for five minutes and check for leaks. 5. Photograph the new cartridge and running-water test, with GPS and date, as proof. Done when: Photo of new cartridge + leak-free running-water test

Where

Host-invited home, Korail Basti, Dhaka 1212

Pay

$140 proposed

This packet is not funded yet, so this figure is a proposed price and not money waiting in escrow. If a buyer funds it, approved proof settles that price onchain. If nobody funds it, approved proof earns provable credit toward the work instead of cash. You see which before you claim, never after.

Proof

Photo of new cartridge + leak-free running-water test

This is exactly what gets it approved. Nothing settles without it.

Level

entry

Open until

2026-10-19

How this work is done

A documented method, so this packet comes out the same whoever does it. Typically 30–60 minutes. Method of record: EPA drinking-water sampling (3Ts / LCR first-draw where lead is in scope)

Bring

• GPS-capable phone
• test kit for each named analyte (nitrate/coliform/arsenic/lead as specified)
• clean sample bottle + label
• nitrile gloves
• camera

Steps

1. 1. Navigate to the sampling point; confirm GPS is inside the posting radius; record the waypoint.
2. 2. Photograph the tap or wellhead with a legible timestamp.
3. 3. If first-draw is required, sample after >=6h stagnation; if flushed, run the tap 2-3 minutes first, then sample.
4. 4. Fill the bottle without touching the inside; cap immediately.
5. 5. Run each test per kit instructions; wait the exact develop/incubation time; read and record every value with units.
6. 6. Record coliform as present/absent after the stated incubation window.
7. 7. Enter all readings, units, GPS, time, and photos into the proof record; sign it.

If it does not match the plan

• Nitrate > 10 mg/L -> tag 'exceeds EPA MCL'; advise no infant consumption pending certified-lab confirmation.
• Total coliform present -> advise disinfection + retest; recommend lab confirmation.
• Arsenic > 10 ppb or Lead > 15 ppb -> tag exceedance; recommend certified-lab confirmation before any consumption guidance.

What counts as done

• GPS waypoint recorded inside the posting radius
• Timestamped photo of the exact sampling point
• Each required analyte recorded with a numeric value + units (or present/absent)
• Sampling type (first-draw vs flushed) explicitly noted

Proof is measured against these, not judged by taste.