Install a certified water filter at an invited Colusa County household on a small system

Colusa County is home to several of the small, under-resourced public water systems the State Water Board's SAFER program has flagged for chronic drinking-water problems in California's Central Valley, and households on those systems often go without any point-of-use treatment at all. Installing a certified filter at an invited kitchen tap gives that household cleaner water starting the same day. Standard: EPA/NSF certified point-of-use filter standard + SDG 6 Proof: Photo of installed filter and certification handoff Method (EPA/NSF certified point-of-use filter standard + SDG 6): 1. Get the resident's invitation and confirm the tap to be fitted. 2. Do not test or sample the household water yourself — install only. 3. Shut off the tap's water supply before starting. 4. Thread on the certified filter housing per the manufacturer's instructions. 5. Restore water supply and run the tap for 2 minutes to clear the new filter. 6. Photograph the installed filter and hand the resident the certification card. Done when: Photo of installed filter and certification handoff

Where

Colusa County household on a small public water system, Colusa, CA 95932

Pay

$260 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 installed filter and certification handoff

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

Level

intermediate

Open until

2026-09-03

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.