SECTION 252:656-27-1. Categories of reclaimed water

  The following are the categories of and allowed uses for reclaimed water:

(1)   Category 1. Reserved.

(2)   Category 2. Category 2 reclaimed water shall only be used for the allowed uses in Categories 3, 4 and 5, and:

(A)   drip irrigation on orchards or vineyards;

(B)   spray or drip irrigation on sod farms, public access landscapes and public use areas/sports complexes, including unrestricted access golf courses;

(C)   toilet and urinal flushing;

(D)   fire protection systems;

(E)   commercial closed-loop air conditioning systems;

(F)   vehicle and equipment washing (excluding self-service car washes)

(G)   range cattle watering; and

(H)   make-up water for oil and gas production.

(3)   Category 3. Category 3 reclaimed water shall only be used for the allowed uses in Categories 4 and 5, and:

(A)   subsurface irrigation of orchards or vineyards;

(B)   restricted access landscape irrigation;

(C)   irrigation of livestock pasture;

(D)   concrete mixing;

(E)   dust control;

(F)   aggregate washing/sieving;

(G)   new restricted access golf course irrigation systems;

(H)   industrial cooling towers, once-through cooling systems, and closed loop systems such as boiler feed water;

(I)   restricted access irrigation of sod farms; and

(J)   hydraulic fracturing.

(4)   Category 4. Category 4 reclaimed water shall only be used for the allowed uses in Category 5 and:

(A)   soil compaction and similar construction activities; and

(B)   existing restricted access golf course irrigation systems utilizing water that has received primary treatment in lagoon systems. Permits to construct shall not be issued for new Category 4 restricted golf course irrigation systems pending further research and evaluation of performance data collected from existing systems.

(5)   Category 5. Category 5 reclaimed water shall only be used for:

(A)   restricted access pasture irrigation for range cattle;

(B)   restricted access irrigation of fiber, seed, forage and similar crops; and

(C)   irrigation of silviculture.

(6)   Category 6. Category 6 reclaimed water, which does not require a permit to supply, shall only be used within the wastewater treatment plant and includes:

(A)   dilution water for chemicals used in the process such as polymers,coagulants, chlorination or dechlorination;

(B)   mechanical seal water for gas compressors, pumps and other equipment;

(C)   mechanical seal water and cooling water for pumps;

(D)   odor and gas absorption including bio-filters used for odor control;

(E)   centrifuge flushing;

(F)   flushing grit and sludge pipes;

(G)   gravity thickener make-up water;

(H)   supply water for filter backwash;

(I)   headworks screen washing;

(J)   headworks screening washer-compactors;

(K)   belt filter press;

(L)   other reclaimed water that is permanently plumbed to a fixed nozzle and contained within unit operations;

(M)   yard hydrants; and

(N)   hose bibs.

[Source: Added at 29 Ok Reg 1061, eff 7-1-12; Amended at 32 Ok Reg 997, eff 9-15-15]