Swap the filter cartridges on schedule at invited Cutler-Orosi homes (2026-07-19)

A reverse-osmosis unit protecting an East Orosi family from nitrate quietly fails when its pre-filters clog and its membrane ages out. The homes least able to buy cartridges are the ones most likely to skip them. A quarterly swap route through invited homes keeps every installed unit actually working, not just present. Standard: NSF/ANSI 58 manufacturer service schedule; SDG 6 Clean Water and Sanitation. Proof: Per-home cartridge photos plus dated log with GPS/date Method (NSF/ANSI 58 manufacturer service schedule; SDG 6 Clean Water and Sanitation.): 1. Confirm each home's unit model and bring the correct pre-filters and post-filters. 2. Shut the valve, depressurize, and swap cartridges per the unit's service order. 3. Sanitize housings, restore supply, and flush per instructions. 4. Mark the swap date on the unit and update the route log. 5. Photograph old and new cartridges at each stop and record with GPS and date. Done when: Per-home cartridge photos plus dated log with GPS/date

Where

Host-invited homes route, Cutler, CA 93615

Pay

$168 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

Per-home cartridge photos plus dated log with GPS/date

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

Level

entry

Open until

2026-10-18

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.