Swap the filter cartridge on schedule at an invited Flint home (2026-07-18)

A lead-removal filter only protects a Flint family while its cartridge is fresh; an expired cartridge quietly stops working. Many households received filters years ago and have no steady help keeping cartridges changed on time. Standard: NSF/ANSI-53 cartridge replacement schedule per manufacturer; SDG 6 Clean Water and Sanitation. Proof: Before/after cartridge photos with dates visible Method (NSF/ANSI-53 cartridge replacement schedule per manufacturer; SDG 6 Clean Water and Sanitation.): 1. Confirm the host's invitation and bring the correct replacement cartridge for their filter model. 2. Remove the old cartridge and check its date against the manufacturer's replacement interval. 3. Seat the new cartridge and run the flush the instructions require. 4. Write the swap date on the new cartridge with a marker. 5. Photograph the old cartridge, the new dated cartridge in place, and record the host address block with GPS and date on. Done when: Before/after cartridge photos with dates visible

Where

Host-invited home, Franklin Avenue block, east side, Flint, MI 48506

Pay

$80 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

Before/after cartridge photos with dates visible

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

Level

entry

Open until

2026-08-17

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.